What is copper wire

copper welding wire

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This section discusses copper welding wire.

For blacksmiths, forges, industries and individuals (homemade workers, self-taught people and enthusiasts).

See below for useful information to help you choose.

Choose brands from the list below the article.

Welding copper wire 0.8 mm. CuSi3. Photo BVB-Alliance

When welding various types of copper and its alloys (bronze, brass), copper welding wire is used as a filler material.

Scope, purpose

Copper and its alloys have high thermal and electrical conductivity and have high corrosion resistance. These properties are widely used in the electrical, chemical and energy-related industries. Frequently encountered copper-based heat exchangers are a striking example of the use of its physical properties.

Copper and its alloys in the molten state actively interact with oxygen and hydrogen in the air , which negatively affects the quality of the weld. Therefore, welding is performed in a shielding gas environment . The best are inert - argon and helium .

Nitrogen also does not react with the elements that make up copper alloys and can be used as a shielding gas for welding. The most common are manual, automatic and semi-automatic argon arc welding, which makes argon welding materials popular.

Gas welding is used for welding non-essential joints .

Welding copper wire ESAB OK Autrod 12/19. Photo 220Volt

Copper welding wire is used in surfacing operations to impart special additional properties (wear resistance, corrosion resistance, etc.).

Symbols and markings

The principles of designation and marking are laid down in GOST 16130-90 . According to this document, the designation includes the following information:

• manufacturing method (cold-deformed or drawn is designated by the symbol “D”; hot-deformed or pressed is designated by the symbol “G”);
• the cross-sectional shape of the wire is always round and has the symbol “KR”;
• data on manufacturing accuracy are usually not available, in which case an “X” is placed;
• according to the condition of the wire, it can be hard (symbol “T”) and more plastic soft (symbol “M”);
• size(diameter);
• in what form is the length of the wire, rod (in coils or coils “BT”, coils “KT”, drums “BR”, cores “SR”, unmeasured length “ND”);
• alloy grade;
• name of the standard.

As an example, we give the designation of drawn welding wire, soft, with a diameter of 2.5 mm, in coils made of BrKhNT alloy:

DKRKhM 2.5 KT BrKhNT GOST 16130-90.

Foreign welding wire is designated according to the requirements of the American Welding Society (AWS) or the pan-European standard.

Kinds

Copper welding wire M1. Photo BVB-Alliance

The chemical composition of copper filler wire, which differs significantly from copper-plated wire, should be close to the composition of the copper alloys being welded. Therefore, the number of types corresponds to existing grades of copper and alloys based on it.

• For welding seams, where strength characteristics are not so important, filler material made of technical copper is used. M1 welding wire is one of these materials.
• Welding of copper alloys, where nickel is the main alloying element (constantan, cupronickel and others), is performed using copper-nickel filler wire, such as, for example, alloyed wire MNZh5-1.
• Copper-aluminum filler wire, such as CuAl8 , is used for welding aluminum bronzes.
• Copper-silicon CuSi3 is used for welding copper-silicon, copper-zinc alloys and galvanized steel in an inert argon gas environment.
• Copper-tin filler material ( BrOF6.5-0.15 ) is used for gas-shielded welding of tin-phosphor bronze and other tin bronzes.
• Brass wire and rods made from it ( L63, L60-1 and others) are used in gas welding of brass and surfacing operations to improve the properties of carbon steels.

Distinctive features, advantages and disadvantages

Aluminum-copper welding wire Bercoweld A8 (CuAl8), 1mm, 5kg. Photo Welding Technologies

In its normal state, copper and its alloys do not interact with the environment. When heated, it begins to react intensively with oxygen, hydrogen, sulfur, phosphorus and other elements.

When the weld seam cools, copper oxides initiate the formation of cracks. To reduce the influence of oxygen, deoxidizing elements are added to the filler wire, and the welding zone is protected with inert gases or nitrogen.

Hydrogen is one of the main causes of weld porosity . Copper, having high thermal conductivity, quickly crystallizes after welding. Hydrogen, which has good solubility in molten copper, does not have time to evaporate and pores form.

A peculiarity of brass welding is associated with zinc burnout. The melting point of zinc is lower than that of the base metal, which leads to its evaporation. Technological techniques can reduce this process.

Please note! Shielding gases and calcination of the filler material reduce the negative effects of hydrogen.

To reduce the influence of increased heat capacity, thermal conductivity and a large coefficient of linear expansion on the welding process of copper and its alloys (hot cracks), it is recommended to heat the welding site . To weld copper workpieces, maintain heating to a temperature of 250°C - 300°C, for bronze workpieces 500°C - 600°C .

Since copper in the molten state has increased fluidity, it is necessary to use linings made of graphite, asbestos and other similar materials on the back side of the seam.

Before welding, it is recommended to clean the filler material and the surface of the weld with a wire brush or medium-sized abrasive and pickle it in an acid solution with washing in an alkaline environment and hot drying.

It is recommended to calculate the consumption of welding wire before starting work.

Manufacturers

ESAB produces copper welding wire for use with almost all copper-based materials. A protective environment of inert gases is a prerequisite for high-quality use of ESAB wire. Some brands of copper wire from this company: OK Autrod 19.12; OK Autrod 19.20; OK Autrod 19.30; OK Autrod 19.40; OK Autrod 19.49 .

Reference. Leading manufacturers of welding wire: DEKA, BARS, Lincoln Electric and others offer a wide selection of consumables. Large enterprises produce high-quality wire of various types: polished, titanium, stainless, steel, powder, aluminum. Among the widest range of wire grades, SV08G2S, ER70S-6, VT1-ooSv, PANCH-11 require special consideration.

Where can I buy

The companies presented in the “Where to buy welding wire” section sell a wide range of filler materials, including copper. You can get acquainted with the presented assortment on the official websites of trading enterprises.

Consumable material in the form of welding wire is widely used in various welding technologies. The presence of this product in the range of manufacturers with influence in the welding materials market is a prerequisite.

ESAB, as a world leader, is distinguished by its production of wide-purpose wires, covering all possible areas of its application.

Areas of application ESAB welding wire is in demand in oil and gas, shipbuilding, mechanical engineering, chemical and other industries. IN

To perform one-time welding work at home, you need to decide on the amount of consumables that you will need to purchase in the store.

In industrial conditions, the amount of welding wire consumed will affect the final price of the product produced and, ultimately, customer demand.

Features of wireWire consumption is influenced by many factors, including the human factor in the context of whether the welder has the required qualifications. However, the most objective value is

Wire is a consumable material that is in high demand today. Therefore, many companies, in Russia and abroad, specialize in the production of welding wire.

The most significant manufacturers, as well as the features of their products, popular brands of consumables and other information useful for craftsmen are presented in this review.

List of countries and manufacturing plantsThe companies have modern equipment at their disposal, qualified employees of the enterprises use the latest technologies in production

Welding work is carried out with any materials - it can be cast iron, steel or non-ferrous metals. Technologies make it possible to perform these works on productive automatic and semi-automatic machines.

The functionality of this equipment is ensured by consumables in the form of wire. ApplicationThe main purpose is to use consumables on semi-automatic machines in an atmosphere of protective gas.

In cases where self-shielding wire is used, welding is performed without gas. The wire is used as surfacing

Source: https://kovka-svarka.net/provoloki/mednaia/

Copper wire

Copper wire is a type of rolled copper that has a very small cross-sectional area to length ratio. It is made from almost pure copper (impurity content ranges from 0.01% for copper grade M1 to 0.5% for grade M3) by cold and hot deformation methods. Widely used in various industries due to its high technology and reliability. Copper wire is sold in the form of coils and coils.

Properties of copper wire

Copper wire is characterized by high electrical conductivity, thermal conductivity, and ductility, which makes it indispensable as a basis for electrical wires and in a variety of electrical devices. In addition, copper wire is resistant to corrosion and environmental influences, has high flexibility and fracture strength.

The specific technical characteristics of copper wire depend on the grade of steel from which it is made (m1, m2 and m3).

Application of copper wire

Due to its properties, primarily electrical conductivity, copper wire is widely used in many industries, including power generation, electrical engineering, construction and repair, telecommunications, automotive, aircraft and many others. Electrical cables, cords and wires are made from copper wire; it is used in various electrical devices, transformer substations, electrical installations, cryogenic equipment, and for winding motors.

Range

Copper wire varies according to:

• Purpose: general purpose, crushing and for low-temperature thermocouples;
• cross-sectional shape: round, square (rectangular) and hexagonal;
• diameter (width) of the cross section;
• state of the material: soft, semi-hard, hard (also: soft with increased ductility, semi-hard with increased ductility and hard with increased ductility);
• production accuracy: normal and increased accuracy;
• type of flasking: with nickel, silver and tin coating;
• by grade of copper: m1, m2 and m3.

In addition, from the point of view of selling copper wire, a distinction is made between copper wire of measured length and on coils.

M1 wire is the highest quality and most expensive of all. It is made from copper alloy of the highest purity - 99.9%.

Accordingly, the copper content is 99.9%, and the percentage of impurities (among which are lead, iron, nickel, arsenic, antimony, bismuth, tin and sulfur) does not exceed 0.1%. According to physical characteristics, it is divided into hard - m1t and soft - m1m.

There are also other types of wire m1: m1k - cathode, m1b - oxygen-free, m1r - deoxidized with oxygen, m1f - copper deoxidized with phosphorus.

M2 wire is made from copper alloy having a technical purity of at least 99.7%. The remaining 0.3% contains the same impurities as m1 wire. oxygen - no more than 0.08%.

M3 wire is considered technical copper and has a purity of 99.5%. It is produced by secondary melting or fire refining.

Selling copper wire

Power of the Urals offers supplies of high quality copper wire at the best prices. All technical characteristics and quality of copper wire exactly correspond not only to GOST standards, but also to technical specifications. We sell copper wire of various markings, including m1m. Delivery is possible anywhere in Russia and the CIS.

Our specialists will quickly and accurately select the wire required for your production (m1, m1m, m2, m3 or other) and ensure timely delivery.

All products have the necessary quality certificates, and the Power of the Urals company is known as one of the largest producers of non-ferrous and ferrous metal products in the Urals since 1996 and has a strong reputation as an excellent manufacturer and reliable partner.

Source: https://su-ltd.ru/mednaya-provoloka/

7 ways to use copper wire in the country and at home

Surely many people at their dacha have a coil of copper wire lying around in the notorious box with the code name “It’s a pity to throw it away,” and maybe more than one. We tell you what and how you can make from copper wire.

The technology for making wire “as we know it” has been known since the 7th century. Wire is produced by so-called drawing - pulling metal through a hole of small diameter. In skillful hands, this material can not only become an original decorative item, but also help in the fight against late blight, and also serve as plant nutrition.

Method 1. Copper wire against late blight on tomatoes

Let us immediately warn you that the method described below is only suitable for the prevention of late blight. To treat plants affected by this insidious disease, more serious measures must be taken.

To prevent late blight in tomatoes, use the following “folk” method. Take a copper wire 1 mm thick and sand it until shiny with fine sandpaper or a knife (this must be done to remove the protective PVC sheath from the wire). Cut the peeled wire into pieces 3-4 cm long.

In order to “get” the wire of the required diameter, you can use a single-core installation wire.

It is most effective to carry out the procedure 2 weeks before planting the seedlings in the ground, but if the moment is missed, you can do it at any other time. It is not recommended to use the method within 2 weeks after planting the plant in the ground, since the seedling needs to cope with “post-transplant stress” and does not need unnecessary stress.

So, use a piece of copper wire to pierce the stem through a little below the first true leaf. Gently bend the edges of the wire down.

If the wire is too thin (less than 1 mm in diameter), first pierce the tomato stem with a needle or awl, and then insert the wire into the hole.

Pretty soon the wound on the tomato will heal, and the plant will begin to receive additional protection from late blight. It happens like this: juice continuously moves along the stem of the plant from bottom to top, and when it interacts with the wire, it is saturated with copper ions, which are subsequently transferred along with the juice to all parts of the plant. This copper “grafting” has a beneficial effect on the disease resistance of tomatoes.

Method 2. Copper wire against late blight

There is another option for using copper wire to prevent late blight of tomatoes. Its essence lies in the fact that the wire is stuck into the soil next to the plant at a distance of 40-50 mm around the bush. The advantage of this method is that it can be used immediately after planting the seedlings in the ground, since the tomato stem remains unharmed.

Method 3. Copper wire as a fruit growth stimulator

To speed up the fruiting of various crops (including tomatoes), the ringing method is used. To “ring” a plant, you need to wrap the stem of the plant with copper wire (preferably thin) at a height of 3-5 cm from the soil.

The champion among wires in terms of the amount of copper wire is the antenna cable.

It is important not to overdo it and accidentally cut the stem. This method will ensure that more nutrients are supplied to the fruits than to the roots of the plant.

Method 4. Copper wire for fruit trees

Some gardeners use copper wire to protect fruit trees (pears, apple trees, etc.) from diseases and strengthen the immune system. To do this, a small piece of wire (preferably thick) is driven into the trunk of an adult tree, and covered with garden varnish on top. The wound will heal over time, and the metal will “feed” the tree with useful microelements.

Method 5. Copper wire for gartering grapes

One of the obvious ways to use copper wire in the country is to use it to make trellises. The advantage of copper wire is that it will not break over time like rope or rust like iron wire. In addition, over time, the wire will begin to feed the grapes with microelements.

The optimal wire thickness for tying vines is 2-4 mm.

Method 6. DIY copper wire jewelry

Wire is the favorite material of many needlewomen. Of course, this material can take any shape and still “hold” it. Jewelry made from metal tubes (the prototype of modern wire) were popular back in the days of Ancient Egypt. It is better to purchase copper wire for handicrafts in a specialized store, since wire of different thicknesses is suitable for different types of products.

Recommended copper wire diameter for different products
Product	Wire diameter, mm
Base for a bracelet or necklace	1-1.4 mm
Ring base	from 1.3
Earrings (bases for earrings)	0,8-1
Pins, pins (fastening elements)	0,6-0,8
Braid	0,4
Clasp	1,3-1,5

For knitting or beading, wire 0.3 mm thick is suitable.

Soft copper wire is best suited for needlework. It should be borne in mind that such wire is easier to break, so for the manufacture of larger products you need to take a stiffer wire.

Method 7. Interior items made of copper wire

From wire you can make original interior items that will look good not only in the country, but also in a city apartment. A little inspiration, patience, a coil of copper wire - and your home will be decorated with a stylish lampshade, basket, panel and other interesting things.

Decorative items for the kitchen are made from tinned wire because it does not oxidize. For other crafts, regular enameled copper wire is suitable.

Wire can be combined with other materials - it looks organically “in duet” with fabric, wood, paper, glass.

There are plenty of ways to use wire in the household, so don’t let it sit idle – put this multifunctional material to use!

Source: https://www.ogorod.ru/ru/main/useful/13478/7-sposobov-kak-ispolzovat-mednuju-provoloku-na-dache-i-doma.htm

Rolled metal

It's safe to say that copper is one of the most important metals due to the fact that it is an excellent conductor of both electricity and heat.

And copper wire has found its application in many areas of our life, be it industry, construction or everyday life.

Main characteristics

Copper wire can be produced with a variety of cross-sectional shapes:

Based on the possible scope of application, round copper wire can be produced in the following types:

• MM - soft type;
• MT - solid type;
• MS - for the construction of suspended type telecommunication lines;

When using oxygen-free copper:

• MTD - solid type;
• MMB - soft type.

When manufacturing it, it is necessary to take into account the requirements of regulatory documentation - GOST 2112-79.

In the production of copper wire, the cross-section of which is made in the form of a rectangle, GOST 434-78 is usually used, according to which two grades are distinguished:

• PMM - soft type;
• PMT - solid type.

Advantages and scope of application

Copper wire is today an important material when performing filigree work. But it is most widespread in industry due to its properties of thermal conductivity and electrical conductivity.

It should also be noted the high ductility of this material. Among its main advantages, we should not forget about high technology and relatively low cost.

Among the advantages of its use, do not forget that it can easily withstand strong temperature changes and high levels of humidity.

The main areas of the economy in which this material is widely used include:

• power generation;
• building sector;
• machine and automotive industry;
• shipbuilding;
• telecommunications;
• printing industry;
• light industry.

Most often, copper wire is used for the production of wires, cables, contact-type wires, rivets, all kinds of decorative elements, as well as low-temperature couples.

If we take light industry, then it is most widespread in the manufacture of shoes, namely, copper nails, fittings and studs are made from wire. In mechanical engineering, it has found wide application for the manufacture of electric motor windings, as well as for transformers.

Fuses are made from it. But most often it is used in the energy sector in the manufacture of electrical wires, due to the lower resistance of copper wire compared to aluminum.

Copper wire available. Retail and Wholesale. All rentals according to GOST. Delivery. Postponement. Guarantees. Call: (812) 640-28-30

Source: https://www.c-met.ru/mednyij-prokat/mednaya-provoloka/

Copper wire: types, properties, applications

These two metals traditionally compete with each other due to similar physical properties. Despite the obvious advantages of copper in electrical conductivity and wear resistance, it loses in price (copper on the stock exchange is more expensive than aluminum). However, copper wire is consistently in demand among consumers. The reason is simple - the optimal combination of physical properties and service life. In the long run, copper wire is an economical purchase.

Areas of application of copper wire

Copper wire is widely used in electrical engineering, mechanical engineering, instrument making, and serves as a semi-finished product for the manufacture of springs and hardware, elements of conductive structures. That is, where a durable, plastic material with high electrical conductivity is required. Welding wire is indispensable when welding thin sheets of metal. It is used in microelectronics, in working with silicon crystals, in microwelding using the thermocompression method, etc.

In addition, the noble color of copper and the malleability of the metal have made wire a favorite material for decorative structures and jewelry.

Types of copper wire

Copper wire varies in its purpose. There is wire for rivets, electrical wire, for the electrovacuum industry and, the most popular, welding wire.

The product is made from copper grades M1 and M2. Differences in pure copper content, which affects electrical conductivity. The marking MM means that the wire is soft, MT is hard. The wire is also made of oxygen-free copper and coated with enamel.

Copper wire comes in different cross-sections, different metal surface conditions and has different mechanical characteristics.

Copper wire UMMC-OTsM

UMMC-OTsM manufacturing plants produce copper wire for rivets according to specifications and welding wire corresponding to GOST 16130-90. The wire is made from grades M1, M2, M3 and M1r. The final product has a clean surface without marks, burrs, cavities or signs of delamination.

Welding wire is produced with a diameter of 2-8 mm. Our own production guarantees strict quality control at all stages. The absence of intermediaries allows us to sell wire at low prices. The logistics department will arrange the delivery of your copper welding wire in the shortest possible time.

Find out more about working conditions and delivery times by sending a request from the UMMC-OTsM product catalog. There you will also familiarize yourself with the entire list of rolled metal products produced by our manufacturing plants.

Source: http://www.ocm.ru/about/articles/2017/ugmk-ocm/mednaa-provoloka-vidy-svojstva-sfery-primenenia

Brands of copper wires and cables: markings, characteristics, manufacturers and application features

There are tens of thousands of different wires and cables on sale. Some of them are made according to GOST standards, and the rest are foreign analogues. Among all the variety, copper products are widely used. We will talk about them today. In order not to get confused in terminology, let’s first clarify what a copper cable and wire are.

Basic Concepts

A wire is understood as a single or multi-core structure, which can be bare (without insulation) or braided with rubber or plastic. Examples of the use of wires are motor windings, parts of radio equipment and power lines.

A cable is an assembly of one or more insulated cores having a single shell. To protect against damage, armor is placed on top.

Advantages of copper conductors

It is not without reason that copper is chosen as a raw material for the manufacture of cable products. Compared to aluminum, it has a number of advantages:

• The resistance of copper wires is lower than that of aluminum. This allows the use of a smaller cross-sectional diameter and reduces heating losses.
• Good corrosion resistance. Complete replacement of supply networks is carried out after 30-35 years of operation.
• Plastic. Copper wire is very flexible, which makes the installation process easier and eliminates kinks.

Insulation layer

It is no secret that the insulation of copper wires prevents human contact with a potentially dangerous current-carrying circuit. Another role is to prevent short circuits between adjacent phases.

The manufacturing material is subject to strict requirements for withstanding voltage, temperatures, UV radiation, and mechanical properties. Most often used:

• PVC. It is characterized by low cost, wear resistance, and satisfactory chemical resistance. The downside is the release of harmful gases when overheated.
• Rubber. Characterized by increased flexibility and resistance to negative temperatures.
• Polyethylene. It has excellent dielectric properties, but not as good flexibility as the first two materials.
• Carbolite. A distinctive feature is heat resistance combined with sufficient ductility.

Section calculation

The cross-section of a copper wire is the area that the core has in cross section. The value is influenced by the long-term permissible load and current strength.

The easiest way to calculate the cross-section is to use data from tables that take into account operating conditions and maximum current. To do this, you will need two more indicators - the total power of electrical consumers (kW or W) and voltage (V). The first is indicated in technical data sheets or on the housings of devices, and the second for city apartments is 220 V.

Next, the obtained power values ​​are found in special tables and compared with the diameter of the conductor. Remember that in calculations it is necessary to leave a small margin in diameter. After all, when connecting new equipment, the load will increase.

Wire brands

The marking of the wires contains instructions on the material design. If the designation does not contain the letter “A”, then the product is made of copper. The most popular brands are:

PBPP (PUNP) - the abbreviation stands for household, industrial flat wire. This product has a cross section of up to 6 sq. mm with PVC insulation. Operates in the range from -15 degrees to +50 degrees. Suitable for installation of lighting systems.

PBPPg (PUGNP) - unlike the previous one, contains stranded conductors. In the name, the letter “g” means flexible. The smallest bending radius is equal to six diameters. Otherwise similar to PBPP. Sold in coils of 100 m, 200 m.

PPV is a flat wire with an insulating layer of PVC plastic. The number of cores can be from 2 to 3 pieces, the cross-section being 0.75-6 sq. mm. Operates on AC or DC voltages of 450 V and 1000 V, respectively. Temperature operating conditions from -50 degrees to 0 degrees. Found application in the installation of lighting systems and power lines.

PVA is a heat-resistant, wear-resistant stranded conductor with colored PVC insulation. The cross-section ranges from 0.75 sq. mm to 16 sq. mm. Network parameters - voltage 380 V, frequency 50 Hz. Used for installing sockets and producing extension cords.

Cable brands

According to their purpose, cables can be power, control, radio frequency and control. Let's look at popular brands:

VVG - refers to power devices with the number of cores from 1 to 5 pcs. The alphabetic code can be translated as vinyl-vinyl-naked. Withstands humidity up to 98%, temperature -50/+50 degrees. Used as a current conductor for networks with parameters 660-1000 V and 50 Hz. The outer shell is black or gray, the insulation is colored (white, yellow and blue). It has a non-flammable version - VVGng, flat - VVGp, etc.

NYM is a copper product with an insulating layer in the form of non-flammable polyvinyl chloride. The space between the insulation is filled with coated rubber, which ensures high strength and heat resistance. Number of cores - 1-5 pcs, cross-section 1.5-16 sq. mm.

Unlike VVG, it is more expensive and is produced only in round shapes, which is not very convenient when laying under plaster. Can be installed outdoors. The bending radius is equal to 4 sections.

KG - abbreviation means flexible cable. It is used in conditions of constant (660 V) or alternating (1000 V) voltage to power portable equipment and welding machines.

Compound

The quality of the connection of copper wires directly affects the electrical contact. There are several connection methods:

Twisting. The easiest option involves removing the insulation and twisting the bare wires. After which the product is re-insulated using PVC tape or special caps. Dissimilar alloys cannot be twisted.

Soldering. The work takes longer than twisting. But the process guarantees a reliable connection. To solder copper wires, you need solder and rosin.

Terminal blocks. This is an insulating plate on which the contacts are located. Ideal for assembling dissimilar materials. Depending on the type of conductor fixation, they are available with a tightening screw or clamping plates.

Spring terminals. Fast and effective option. It is enough to tear off the insulation, exposing the core, and insert the terminal with a spring clip.

Photos of copper wires and cables

Source: https://electrikexpert.ru/marki-mednyx-provodov-i-kabelej/

What is tinned copper?

Nowadays, copper coated with a layer of tin is in high demand in various areas of industrial production. Its main characteristics are resistance to physical influences and natural disasters: precipitation and sudden temperature changes.

Thanks to these parameters, tinned copper is in demand and indispensable in the industrial field; in addition, it has a significant difference from other materials: it conducts heat and electricity well.

Distinctive features

This type of metal has high ductility, so it is convenient to subject it to mechanical processing. Tinned copper is used in many areas of production:

• electrical engineering for the manufacture of copper conductors,
• It is used to braid objects used in military and civil affairs.

Let's find out what is the difference between tinned and untinned copper?

The first type of metal material is protected from physical and natural influences, because the wire has a tin film that protects the metal and prevents it from entering into chemical reactions with other substances. Tin protects the material from corrosion, giving it high strength, so copper does not break when the shape of the wire changes.

How is tinned copper obtained?

Tinned copper wire is produced by galvanic method. This route is used because it makes it possible to apply an even coating of tin to a metal product. The thickness of the layer is the same along the entire length. Nowadays, tinned copper wire can be found in stores in two forms:

• Soft tinned wire, also known as MML;
• Solid tinned wire (MTL).

Options

The feature that distinguishes the two types of wire is its attitude to deformation. The diameter of tinned copper and aluminum are different. Wire with a diameter that ranges from 0.02 to 9.42 millimeters is in high demand.

To produce this copper, the wire is taken on a spool and subjected to galvanic tinning. Then it is passed through a bath designed for tinning copper wire, where molten tin is located.

To prevent it from reacting with oxygen in the oxidation reaction, the surface of the tin bath is treated with substances that do not allow air to pass through. Charcoal is perfect for these purposes.

What are the features of tinning a soldering iron tip?

The main thing in tinning is coating the copper base with a thin layer of tin, which can protect the material from corrosion and the effects of natural anomalies. This process has characteristic properties.

• First of all, prepare the working surface: use the latest soldering iron, sharpen the tip of the device for further work.
• The tip is sharpened with a soldering iron or machine at an angle of up to four hundred degrees.
• If you need to work with small parts, the soldering iron should have a cone shape.

Experts advise ensuring that the width of the material is at least one millimeter. If the client likes the shape of the tip offered by the manufacturer, then this stage is not so important.

During production, the soldering iron rod becomes coated with copper. Before the tinning stage, it is necessary to remove the coating with sandpaper. Then the tip returns to the device, and the soldering iron is connected to the electrical network. After some time, the surface will heat up, then it will be possible to carry out tinning.  

Technology

Over time, the copper surface is able to react with oxygen to form its oxides. To prevent this, the material is coated with a layer of tin. To do this at home you need to use solder, a soldering iron and flux.

To carry out high-quality work, you need to warm up the soldering iron well. Then the copper product is coated with a substance made of resinous substances and heated over the entire area. Tin is distributed over the entire section of the wire, which is first treated with rosin.

Due to intense physical activity, the conductors in the headphones that use low voltage current are broken. They have a small diameter, and because of this, when tinning they use other technologies: first, the broken wires are soldered off, then new ones are soldered. In order to provide insulation, the wires are coated with varnish, which is removed. The tin layer makes subsequent soldering easier.

Source: http://lom-cena.ru/o-nas/stati/chto-takoe-luzhenaya-med

Copper wire

Name	Brand	Size	Price
Copper wire	M1	0.1-1.2 mm	from 580 rub/kg
Copper wire	M1	from 1.2 mm	from 490 rub/kg

Copper wire is widely used due to its universal characteristics. This product has good conductor properties, in addition, it is characterized by high thermal conductivity, ductility, strength and corrosion resistance. These advantages have made copper wire indispensable in the electric power industry, mechanical engineering and other industrial fields.

Copper wire is the optimal material for electrical wiring. It is used as a conductor for electricity.

The plasticity and viscosity of copper makes it possible to make very thin wires from it, which are used in electronic devices. As a rule, wire with a diameter of up to 8 millimeters is suitable for these purposes.

Such wires may have a protective coating. They also come tin-plated. The composition of electrical wire consists of 99.99% copper.

In addition, windings for motors, cables, cords, wires and other products are made from copper wire.

Depending on the scope of application, the following types of copper wires are distinguished:

• electrical engineering;
• for the electrovacuum industry;
• for rivets;
• welding

Characteristics of copper wire

Copper wire is made either from pure copper or clad with silver, nickel or tin. For example, copper-nickel wire is resistant to both low and high temperatures, as well as oxidation and corrosion. Cladding copper wire improves its quality, which is especially important for the aviation and space industries. The strength of copper wire is many times greater than that of aluminum.

Copper wire is produced in coils or coils. The product also comes in custom lengths. It all depends on the diameter size. Copper wire with a diameter of 0.2 - 0.8 mm is supplied in reels weighing 18 - 25 kg. Wire with a diameter of 0.8 - 1.0 mm is produced in coils weighing 46 - 58 kg. If the wire diameter is larger, it is supplied in coils of 70–100 kg.

Copper wire is made by drawing the workpiece through several gradually smaller holes. As a rule, the wire cross-section is round.

Advantages of copper wire

Today, copper wire is one of the main materials for creating communication networks. The product is applied in every car, electrical measuring instrument or aircraft. This wire has a low resistivity, so wires made from it can reduce energy losses and increase the efficiency of products.

This material is easy to process and bends, but does not break. The wire is good for soldering and combining with other metals. The shelf life of such a product is very long, it can even be several decades.

But the electrical properties of copper wire are negatively affected by impurities. They may reduce electrical conductivity. Therefore, if you are going to buy copper wire , pay attention to the fact that it complies with GOST and is made from carefully cleaned material.

Where can I buy good quality copper wire?

The Alfa-Soyuz company offers rolled metal products of the highest quality. You can buy copper wire from us at an affordable price that meets strict quality standards. Our products fully meet the parameters required in electronics and other fields. If you decide “ I’ll buy copper wire !”, contact our managers who will answer all your questions. We supply products throughout Russia.

Source: https://www.alfa-sous.ru/katalog/czvetnoj-metalloprokat/provoloka/provoloka-mednaya.html

Tinned copper: concept, composition, manufacture, characteristics and application

What is tinned copper? Let's start with the fact that currently this metal is widely used in various industries. Among the distinctive features of wire, which explain the demand for it, one can note its resistance to external influences: precipitation, temperature changes.

Copper wire also compares favorably with other metals with its high thermal and electrical conductivity.

Distinctive Parameters

Tinned copper has high ductility and can be easily machined. It is this material that is used in electrical engineering for the manufacture of conductive cores of copper cables and braiding for military and civil products.

Let's try to find out the difference between tinned and untinned copper. The first option is more protected from external influences, since the wire is coated with a layer of tin. This metal protects the metal thread from any manifestations of corrosion, giving the material increased tensile strength. Tinned copper does not break when bent.

Receipt

Tinning is carried out using the galvanic method. It makes it possible to apply a thin, even coating of tin (from 1 to 20 microns) to copper. The layer thickness throughout the wire is the same, so there is no “double diameter” of the wire.

Currently, tinned copper is available in two varieties:

• copper soft tinned wire (MML);
• solid tinned copper wire (MTL)

Characteristics

The main distinguishing feature between them is the ability to bend. The diameter of tinned copper and aluminum can differ significantly. The most widely used wire is the one whose diameter is in the range of 0.02-9.42 mm.

To make it, use ordinary copper wire on a reel, subjecting it to galvanic tinning. The material is passed through a tin bath containing molten tin. To prevent it from entering into oxidation with oxygen in the air, the surface of the bath is covered with substances that cannot allow air to pass through. In particular, such a substance may be charcoal.

Stages

In order to understand what tinned copper means, let’s take a closer look at the main stages of the ongoing process. First, the copper wire, which is mounted on a special feed mechanism, is cleaned. The essence of the process is passing through special wiping brushes moistened with a solution of zinc chloride (this salt is obtained by reacting granulated zinc with hydrochloric acid).

Next, the wire is lowered into a tin bath, where molten tin is located, resulting in tinned copper. A photo of the finished product demonstrates the uniformity of the applied layer.

It is important at this stage to prevent the appearance of “sagging” on the wire, as they lead to rejection of the batch due to deviations from the declared diameter.

At the next stage of creating tinned wire, the material is passed through rubber brushes (their diameter should not exceed 0.14 mm) or through a drawing mechanism with diamond discs. A similar procedure is required to give the wire surface perfect uniformity.

The material is then cooled by passing through a container of cold water. The cooled wire is re-passed through a drawing mechanism with diamond discs, getting rid of the remaining “sagging”.

The final step is feeding the wire to the receiving mechanism. Here it is fixed to a special reel. Having gone through the entire chain, the wire is absolutely ready for sale or for the subsequent creation of cables of different sections. Before tinned wire is sent to consumers, it must undergo a control procedure. Its essence is to carry out several operations that will prove its compliance with TU 16-505.850-75.

Features of soldering iron tinning

The essence of tinning is to coat a copper part with a thin layer of tin, which protects the product from corrosive processes. Soldering iron servicing has some distinctive features.

It is important to prepare your work surface first. Take a new soldering iron and sharpen the tip of the device. To do this, the tip is pulled out, armed with a soldering iron or an electric machine, at an angle of up to 400, then sharpened. If the soldering iron is being prepared to work with small radio components, it must be given a conical shape.

Professionals recommend ensuring that the width of the sharp wedge is not less than a millimeter. If the shape of the tip proposed by the manufacturer suits the consumer, you can skip this stage.

Since at the factory the soldering iron rod is coated with patina - greenish copper oxide, it is important to remove the coating with an abrasive material (sandpaper) before tinning. Next, the tip is returned to the device, and the soldering iron is connected to the electrical network.

You need to wait until the surface of the tip warms up evenly, and then proceed to tinning.

 Characteristics of copper wire

Distinctive features: high electrical and thermal conductivity. Due to its high ductility, copper wire is an indispensable material as a base for electrical devices and wires. Also, copper wire has good flexibility and is resistant to breakage. Not exposed to the external environment, resistant to corrosion.

The technical characteristics of copper wire vary depending on the brand (M1, M2, M3).

Types of copper wire:

— by purpose: general, for low-temperature thermocouples, crushers;

— in shape: square (or rectangular), hexagonal, round cross sections;

- by width or diameter of the section;

— according to the state of the material: hard, semi-hard, soft (as well as all of the above states with increased plasticity);

— in terms of production accuracy: normal, increased;

— by type of cladding: coatings with tin, silver, nickel;

— by brand: M1, M2, M3.

In turn, solid wire, despite its strong structure, does not have high flexibility. Soft copper wire is easy to bend. The MM marking material is the main part for conductive cables and constituent conductors of different sections. Copper wire becomes soft after the annealing operation.

The color of copper wire is golden-red or reddish-pink. The copper surface shines until oxidation (reaction upon contact with air), after which a film of oxides forms and the shine fades.

The surface must be free of cracks, nicks, delaminations, scratches, dents and other defects with a depth greater than the maximum deviation. Drips and stains of technological lubricant, reddened surface are allowed.

The metal products market also offers special types of copper wire:

— MS wire has a special set of properties and is intended for communication lines over the air;

- enameled: MME (soft enameled copper), MTE (hard enameled copper);

— grades of oxygen-free copper wire: MMB (soft) and MTB (hard).

Rolled copper of this type can be produced either from pure copper or clad with coatings of Sn, Ni, Ag. Oxidation resistance, resistance at low or high temperatures (up to 750 ºС), anti-corrosion properties, combines copper and nickel wire. The use of Ni and Ag for cladding allows the production of high-quality products used in: aviation and space defense, electronics, television communications and other fields.

The strength properties of copper-based wire are an order of magnitude higher than those of aluminum.

Diameter and cross-section of copper wire

You can buy copper wire with a round, rectangular, hexagonal, and square cross-section. The diameter of copper wire with a round cross-section is from 0.02 to 6 mm. The diameter of the copper wire rod is 7 – 16 mm. The cross-sectional dimensions of rectangular copper wire are indicated in two numbers, for example: 2.26x19.5 mm, 2.63x35 mm, 4.75x12.5 mm, 4.7x22 mm, etc.

Wire M1

M1 brand wire is considered the highest quality and most expensive. The purity of the copper alloy used for its production is 99.9%. Composition: Cu – 99.9%, impurities (such as Pb, Fe, Ni, S, As, Sb, Bi, Sn) – not higher than 0.1%. According to physical characteristics, there are: hard (M1T), soft (M1M). Other types of M1 wire: oxygen deoxidized (M1P), oxygen-free (M1B), phosphorus deoxidized (M1F), cathode (M1K).

Wire M1 differs from other rolled products (M2, M3) by increased performance characteristics, due to the minimum content of impurities in the material. It has good thermal and electrical conductivity. Bends well while maintaining strength properties. Nice appearance.

This wire is most often used in such areas as aircraft and shipbuilding, and electric power. They produce cords, cables, thermocouples, wires, and high-tech cryogenic equipment.

Wire M2

It is primary copper, which has a high content of the base metal and a minimal amount of impurities. M2 wire is made from copper alloy having a technical purity of no less than 99.7%, and impurities of no more than 0.3%, respectively (the same elements as in the M1 grade). The percentage of oxygen is not more than 0.08.

According to the production method, copper wire M2 is: M2b (oxygen-free), M2f (deoxidized with phosphorus), M2k (cathode), M2r (deoxidized with oxygen). According to physical parameters, they are divided into: hard (M2T) and soft (M2M) rolled copper.

Electrical copper wire

Manufacturing is carried out in accordance with GOST 434-78, from grade M1 or higher. It is characterized by a rectangular cross-section, with a thickness from 0.5 to 12.5 mm, a width from 2 to 35 mm. This copper wire can be purchased in the following grades: PMM (soft), PMT (hard). Produced in coils. Electrical round copper wire is used to make: cords, cables, wires, motor windings, etc.

At 20 ºС, the product has an electrical resistance: not exceeding 0.01724 Ohm•mm2 for MM brand products; 0.01780 Ohm•mm2 – for MT (Ø up to 2.44 mm inclusive); 0.01770 Ohm•mm2 – for MT (Ø above 2.44 mm).

For a product of the MM brand, the relative elongation is:

— Ø from 1.80 to 5.00 mm (inclusive) – 30%;

— Ø more than 5.00 mm – not less than 35%.

Copper Welding Wire

These rolled copper products are widely in demand these days in various fields. Based on the name, copper welding wire is used when performing gas welding work. Depending on the nature of the work performed, one or another grade of metal or alloy is used. When welding thin sheet metal, welding wire is indispensable.

For example, for automatic welding of copper structures, or submerged arc welding, in environments with inert gases, pure copper wire is used. Welding electrodes are produced from rolled products of this type, which are used to weld cast iron and copper.

In microelectronics, such products are used as connections in semiconductors. Also, copper welding wires with large cross-sectional areas are used in modern annealing and processing technologies when working with silicon crystals.

Copper wire production

The main copper alloys for making wire are M1, M2, and sometimes M3. GOST 859-2001 determines the chemical composition. The process of selection, sample preparation and analysis of the chemical composition of non-ferrous metals and alloys is carried out in accordance with GOST 24231-80.

Drawing is the most common method of producing wire. The technology of this process involves pulling the workpiece through holes of the required diameter (cold deformation). So, for example, they produce copper wire with a diameter of 2 mm.

Copper has absorbed high plastic properties and can be cold deformed without problems. When producing copper electrical wire, it is important to be able to obtain a constant diameter with the absence of cavities and other possible defects. This non-ferrous rolled product is produced using special installations called drawing mills.

The main working part is the die of the machine; it is made from tool steel, which has increased strength properties. Drawing eyes, which are one or more holes located in the dies. The wire diameter depends on the working diameter of the hole.

The first step in the production of copper wire is to form a thick piece of wire rod. If it is necessary to obtain thin wire, the workpiece is gradually passed through drawing eyes, the diameters of which decrease. This technology makes it possible to produce wire with a diameter of 0.2 mm with the highest precision.

In the manufacture of wire, to obtain a high-quality surface without defects, lubricants are used to protect and reduce the degree of friction between the workpieces and steel matrices. The blanks and dies are constantly cooled with special mixtures, water or air, because Elevated temperatures lead to deterioration in the quality of finished products. For example, in this way, round copper electrical wire is produced, which is subject to increased demands.

Drawing is a highly productive process, waste-free production, regardless of the diameter of the resulting product.

The wire is then further processed to give it the required properties. For example, when annealed it becomes soft. Electrical copper wires are subjected to tinning and other processing methods.

Finished products are delivered to the warehouse or sent to the buyer. Delivery in coils is carried out for copper wire with a diameter of less than 1 mm, and for larger diameters, the rolled products are twisted into coils. You can buy copper wire according to the following parameters: Ø from 0.2 to 0.8 mm - in coils weighing up to 100 kg; Ø 0.8 - 1 mm - in coils weighing up to 25 kg.

GOST standards for copper wire  

GOST 2333-74 – regular

GOST 434-78 – rectangular shape

GOST 16130-90 – for welding

TU 48-21-158-72 – for the electrovacuum industry

GOST 4752-7 – crushing (crushing columns are produced for crushing devices that measure the maximum pressure in weapon barrels, cylinders, etc.)

GOST 2666-77 – for thermocouples at low temperatures

TU 48-21-456-75, TU 48-21-456-76 – for rivets

Application of copper wire

Due to its high electrical conductivity, copper wire is widely used in such areas as construction, electric power, automotive and aircraft manufacturing, etc. In most cases, using copper wire (with a diameter of up to 8 mm), electrically conductive conductors (wires, cords, cables) are produced. Copper bars are used in electrical engineering, cryogenic equipment, transformer substations, and are also used as motor windings.

Main applications of copper wire:

— galvanization — if it is necessary to coat the surface of small-volume products, use copper wire;

- construction - often used for decorative cladding, plastering, or as a material for reinforcement and shielding;

- welding - welding thin sheet metal;

- light industry - used for frames when sewing soft toys, also handmade crafts are made;

- costume jewelry - jewelers use it to make jewelry, jewelry;

- electrical engineering - in this area, copper wire has the greatest application, it is used for the production of almost all types of electrical conductors, and serves as a winding in engines;

- agriculture - used to accelerate the maturation of plants;

- medicine - copper wire is used in folk and scientific medicine.

Supplier: LLC RTG "MetPromStar"

Source: https://www.okorrozii.com/metalloizdeliya/mednaya-provoloka.html

How to distinguish copper from other metals

For most of us, knowledge about copper and its properties is limited to a school chemistry course, which is quite enough at the everyday level.

However, sometimes there is a need to reliably determine whether a material is a pure element, an alloy, or even a composite material.

The opinion that this information is needed only by those who are engaged in the acceptance or delivery of scrap metal is erroneous: for example, on amateur radio forums, topics are often raised about how to distinguish copper in wires from copper-plated aluminum.

Briefly about element No. 29

Pure copper (Cu) is a golden-pink metal with high ductility, thermal and electrical conductivity. Chemical inertness in an ordinary non-aggressive environment is ensured by a thin oxide film, which gives the metal an intense reddish tint.

The main difference between copper and other metals is color . In fact, there are not so many colored metals: only gold, cesium and osmium are similar in appearance, and all elements included in the group of non-ferrous metals (iron, tin, lead, aluminum, zinc, magnesium and nickel) have a gray color with varying intensity of shine.

An absolute guarantee of the chemical composition of any material can be obtained only through spectral analysis. The equipment for carrying it out is very expensive, and even many expert laboratories can only dream of it. However, there are many ways to distinguish copper at home with a high degree of probability.

1. Determination by color

So, we have before us a piece of unknown material that needs to be identified as copper. The emphasis on the term “material” rather than “metal” was made specifically, since recently many composites have appeared that are very similar to metals in appearance and tactile sensations.

First of all, we consider color. It is advisable to do this in daylight or “warm” LED lighting (under “cool” LEDs, the reddish tint changes to yellow-green). It is ideal if there is a copper plate or wire for comparison - in this case, errors in color perception are practically eliminated.

Important: old copper products can be covered with an oxidized layer (a greenish-blue loose coating): in this case, the color of the metal must be looked at in a cut or saw cut.

2. Determination by magnet

Color matching is a reliable but not sufficient method of identification. The second step of independent experiments will be a test with a magnet. Chemically pure copper is classified as diamagnetic - i.e. to substances that do not respond to magnetic influence.

If the material under study is attracted to a magnet, then it is an alloy in which the content of the main substance is no more than 50%.

However, even if the sample did not react to the magnet, it is too early to rejoice, since often an aluminum base is hidden under the copper coating, which is also not magnetic (this can be eliminated by filing or cutting).

3. Determination by reaction to flame

Another way to identify copper is to heat a sample over an open fire (gas stove, lighter or regular match). When heated, copper wire will first lose its shine and then turn black-brown, covered with oxide. This method can also be used to cut off composite materials that, when heated, begin to smoke and form a gas with a pungent odor.

4. Determination through chemical experiments

The reaction with concentrated nitric acid is indicative: if the latter is dropped onto the surface of a copper product, a green-blue color will occur.

A qualitative reaction to copper is dissolution in hydrochloric acid followed by exposure to ammonia. If a copper sample is left in an HCl solution until completely or partially dissolved, and then ordinary pharmaceutical ammonia is dropped into it, the solution will turn intensely blue.

Important: working with chemicals requires precautions. Independent experiments should be carried out in a well-ventilated area using personal protective equipment (rubber gloves, apron, goggles).

How to distinguish between copper and its alloys?

Copper alloys are widely used in industry. Over many years of research, it has been possible to obtain many materials with unique properties: high ductility, electrical conductivity, chemical resistance, strength (all depends on alloying additives). The most common are bronze (with the addition of tin, aluminum, silicon, manganese, lead and beryllium), brass (with the addition of 10-45% zinc), as well as copper-nickel alloys (nickel silver, cupronickel, copel, manganin).

Only bronze and brass are difficult to identify, since copper-nickel alloys differ significantly in color due to their low copper content.

Copper or brass?

Brass can contain from 10 to 45% zinc, a silver-gray metal. Naturally, the more zinc, the paler the alloy. However, high-copper brasses, in which the amount of additives does not exceed 10%, differ little in color from the copper sample.

In this case, you can only trust your feelings: brass is much harder and more difficult to bend (for greater reliability, a comparison with a reference sample is advisable). You can try to remove the shavings: copper shavings will have a curl shape, brass shavings will be straight, needle-shaped.

When the samples are placed in a solution of hydrochloric acid, no reaction with copper is observed, and a white coating of zinc chloride forms on the surface of the brass.

Copper or bronze?

Like brass, bronze is much stronger, which is explained by the presence of harder metals in the alloy. The most reliable test will be a “tooth test” - there is unlikely to be a trace of pressure left on the surface of the bronze.

You can also experiment with a hot saline solution (200 g of table salt per 1 liter of water). After 10-15 minutes, a copper sample will acquire a more intense shade than a bronze one.

For those familiar with electrical engineering

Very often, copper cores from electrical cables are sold as scrap non-ferrous metals, and there are often cases when copper-coated aluminum is used in the production of electrical products. This material has a significantly lower density, but due to its irregular geometric shape, determining the volume to calculate the density is quite difficult.

In this case, copper can be determined by electrical resistance (of course, if you have the appropriate instruments - a voltmeter, ammeter, rheostat). We measure the cross-section and length of the core, take instrument readings, and Ohm’s law will help you.

Resistivity is a fairly accurate characteristic by which any metal can be identified with a high degree of reliability.

Conclusion

It is possible to accurately determine the quality of copper scrap or the content of the main substance in the alloy only after an examination: all of the above methods are approximate. If we consider pricing when purchasing scrap metal, the most expensive is electrical copper, the cheapest are alloys of the brass group. The final cost of the transaction can be clarified with the managers of companies involved in the purchase of scrap non-ferrous metals.

Source: https://blog.blizkolom.ru/kak-otlichit-med

Reception of copper wire - it is expensive to hand over 1 kg of copper wire

Copper wire is one of the most popular products on the secondary market, and the acceptance of such scrap metal is always relevant in Moscow.

Copper has a set of unique physical characteristics and can be easily processed, fully retaining its technical properties.

The price for 1 kg of scrap copper wire depends on the market price for the metal and is made up of the quality characteristics of the scrap metal, but such raw materials in any condition will be gladly accepted at the collection point at a high cost.

Real prices

* We do not publish advertising (inflated) prices. Only the real cost of the purchase!

Receiving copper wire

Copper wire

350 rub.

360 rub.

370 rub.

up to RUB 385,000

Reception of copper wire in Moscow is carried out according to general rules, the main requirements are the following factors:

• Chemical purity of the alloy. Copper must be free of impurities or chemical contaminants that could affect the quality of the extracted raw material.
• Clogging percentage. As a rule, a copper core is used in combination with various materials that protect the metal core from mechanical damage. Any foreign components are removed before remelting, and it is most profitable to hand over scrap copper wire without sheathing or contaminants.
• Dimensions of scrap metal. The diameter of the rods, the total weight of the scrap batch and the size of the pieces of copper wire are taken into account.

The copper collection point in Moscow evaluates the wire upon purchase and sets the current cost per kg of raw material.

How to sell wire for scrap metal

If you need to sell copper wire, you should contact a scrap metal collection point that not only buys it, but also processes it. In this case, you will be able to sell scrap at a high price and on favorable terms. Wholesale customers can take advantage of the comprehensive reception service, in which all preparatory, loading and transportation work is carried out by company employees.  

Why is it worth handing over copper scrap to the Interlom company?

The most profitable purchase of copper wire is carried out by our company, which offers high prices for raw materials of this category in any condition. We accept scrap wire in any volume, and you can deliver both small volumes of metal products and large quantities at attractive prices. One of the advantages is a comprehensive purchase, when you do not need to spend your money on renting special equipment and hiring workers to carry out preparatory work on the wire.

Our advantages

01

We accept scrap metal at the best prices in the city. Individual prices from 1 ton of scrap

02

We provide a full package of documents after the transaction

03

We accept any volume of raw materials

04

We pay instantly, offer
cash and bank transfer

05

We carry out purchases seven days a week, around the clock in all districts of Moscow

and regions

Pickup service from Interlom

We accept scrap non-ferrous and ferrous metals with free removal in Moscow and the Moscow region. We have our own fleet of vehicles with all the necessary equipment, thanks to which we can remove any amount of scrap metal.

Find out more

Source: https://metallolom-moscow.ru/priem-mednoj-provoloki

GOST standards

 

Technical characteristics and properties of copper wire are regulated by GOST 434-78, GOST 22666-77, GOST 4752-79. Copper wire is made from copper of at least grade M1 with a chemical composition in accordance with GOST 859. Copper wire with a diameter of 0.2-1 mm is wound on coils. Copper wire with a diameter of more than 1 mm is wound into coils. Copper wire is produced in two ways: cold-deformed (D) - by drawing, and hot-deformed (D) - by pressing.

Classification of copper wire

By purpose:

• general purpose - GOST 434-78;
• for low-temperature thermocouples - GOST 22666-77.
• crushing - GOST 4752-79;

According to cross-sectional shape:

• rectangular - PR.
• round - KR;

As of:

By type of processing:

• silver;
• nickel;
• tin.

By lenght:

• measured length - MD;
• on coils - CT.

Manufacturing of copper wire

The method of producing copper wire is associated with a high degree of ductility and ductility of copper. Copper wire is produced by drawing (drawing) a copper billet (wire rod) through calibrated holes of successively decreasing diameter. The finished products are wound into coils or onto special reels, which can be plastic or metal.

Application of copper wire

The main advantage of copper wire is its versatility; it is used in almost any industry, in mechanical engineering, electric power, construction, printing, light industry and many other industries.

The main purpose of using copper wire is in transformers and contacts in the manufacture of wires, cables, cords, motor windings, the manufacture of copper nails, rivets, and fittings.

Copper wire is ductile, cuts well, bends, lends itself to any type of welding, and has good corrosion resistance, has proven itself under temperature fluctuations, and it is relatively inexpensive, and if you anneal the copper wire, you can increase its ductility.

The PKF Nevsky Aluminum company sells copper wire at affordable prices. From us you can buy copper wire of any size and in any volume. At the customer's request, copper wire can be unwound in any quantity.

Source: http://www.na-metal.ru/med_provoloka.html