Hand over electrical aluminum at a price of 100 rubles. for 1 kg in RND
convincing prices for electrical aluminum scrap in Rostov-on-Don from the agent for secondary raw materials -.
You can sell electrical aluminum in Rostov-on-Don at a high price at our recycling collection points.
Request a call and we will provide you with special conditions, as we work closely with dozens of recycling plants and other buyers of electrical aluminum throughout Russia. Our reception points in Rostov-on-Don are open for you.
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The widespread use of aluminum and its alloys is easily explained by the prevalence of this metal in the earth's crust. In terms of total volume, it is second only to oxygen and silicon. The widespread use of aluminum is also facilitated by its physical and chemical properties. First of all, this is resistance to corrosion under normal operating conditions and low weight of the metal.
General classification of aluminum scrap
The division of aluminum metal waste into standard categories has a complex multi-level structure. Initially, all scrap is divided into classes such as:
- lump;
- shavings;
- other metal.
Aluminum in powder form is excluded from their classification according to GOST 1639-2009.
After this, aluminum scrap is divided into 10 categories based on chemical composition and several grades depending on the shape, size and type of products. Electrical scrap belongs to the highest categories of metal waste and is accepted without restrictions by all points of our company.
Aluminum scrap
Types of electrical scrap
The price of aluminum scrap depends on the purity of the chemical composition. In this regard, electrical scrap is so highly valued that it is on par with food-grade aluminum, which is used to make dishes and kitchen items.
The most common electrical materials and aluminum products are:
- wires of various designs and sections;
- electrical cables;
- conductive busbars;
- wire and rod;
- some types of profile;
- sheets and castings with a base metal content of at least 95%.
The very name of this type of aluminum scrap makes it clear that it represents waste, waste materials and unsold remains intended for use in the field of energy, power supply and communications.
Electrical aluminum scrap
Features of acceptance of electrical scrap
In order to get the greatest profit when selling aluminum, the metal must be sorted by type of product. Cables, wires and other materials should be cleaned of surface insulation and other protective coatings. Contamination is considered to be winding, polymer insulation, the presence of solders, mica, varnish, paint and other coatings.
Our points accept aluminum electrical waste in a form not prepared for delivery. But in this case, the price of scrap will be significantly reduced, since the company incurs additional costs for sorting and recycling the metal. Therefore, preparing electrical aluminum scrap for delivery to a collection point is an important point for every secondary metals deliverer.
It is always profitable to hand over electrical aluminum scrap at our points. The available technical equipment allows us to accurately determine the purity of the chemical composition and the exact weight of the scrap. Our clients are always confident in the accuracy of the estimate and the high level of payment. Price clarification and additional information by phone provided on the website.
Source: https://scraptraffic.com/rostov-na-donu/alyuminij-elektrotexnicheskij/
Electrical aluminum
There are many collection points for metal waste, including electrical aluminum, in Moscow. MosVtorKabel reception points are located near many metro stations, so getting to them is not difficult. We accept raw materials at a high price, and inspection takes minimal time.
The company has been operating for a long time, so all processes of receiving, evaluating and storing material are fine-tuned to perfection. And payment for raw materials occurs in a way convenient for the client (cash and bank transfer). Our prices for aluminum scrap are favorable (customers can verify this by conducting a small analysis of the pricing policies of organizations engaged in similar activities).
We directly cooperate with factories and enterprises whose activities include processing and recycling of metals.
Don't waste your time - use our services!
Type of cable scrap Cost per kg. Per metal content Gross| Electrical aluminum wires in a cableType of cable scrap metal | 60-85 rubles for metal content (kg) | 30-60 rub. Gross (kg) |
The MosVtorKabel company is ready to offer its customers two options for receiving metal waste:
- delivery of a batch of material to the metal receiving point independently;
- in case of a large volume, we pick up scrap from anywhere in Moscow and the Moscow region.
Demand for aluminum electrical scrap metal
The MosVtorKabel company accepts metal at the highest cost in the city. But this agreement is carried out only on the condition that the material complies with the established standards and requirements. The scrap must be clean, free from dust and dirt, water and impurities of other metals.
All this reduces the cost of raw materials. Before the weighing process, the scrap is sorted according to purity, then the cost is announced to the client. Applications for the delivery of recycled aluminum materials are accepted around the clock. At reception points, company employees strictly adhere to a work schedule without lunch.
The MosVtorKabel company buys electrotechaluminium at an expensive price
Above you can see the table and prices offered by the MosVtorKabel company. Please note that the cost is indicated within certain limits, since the specific price depends on certain parameters that are clearly defined in the waste collection regulations.
Before handing over raw materials, we recommend that you clean the metal from insulating tape, rubberized edging, remove rust, and fragments from materials that do not belong to the category of metals. Otherwise, the cost of the material will decrease significantly. Dirty and contaminated aluminum has a coefficient different from 100% containing raw materials.
You can clarify the details of receiving aluminum waste from the manager by contacting him by telephone.
The MosVtorKabel company accepts orders within 24 hours. At a time convenient for the client, specialists carry out the procedure for receiving electrotechaluminum in Moscow and the Moscow region. It is also possible to receive raw materials from other localities.
Application and Advantages
Aluminum is one of the metals that is widely used in manufacturing and various industrial applications. The material is of considerable importance in the creation of electrical structures. Practice has shown that after processing the material does not lose its technical characteristics; they remain at the same level as after production. Recycling ready-made material costs several times less, so recycling aluminum cables as scrap is in demand and highly valued.
Where is electrical aluminum found?
Electrical aluminum is used in the industrial sector to create electrical appliances and mechanical products. The material is used in the production of wiring, bases for incandescent light bulbs, heat exchange devices, protecting the windings of transformers and radiators, as well as many other electrical appliances.
Advantageous features of electrotechaluminium
Electrotechaluminum is expensive. The reason for this is its high wear resistance and the ability to be used several times. Aluminum undergoes simple processing, that is, it is melted and processed mechanically; for this there is no need to use specialized mechanisms and equipment.
Aluminum has a wide range of applications. For example, it is indispensable in the production of all kinds of housing parts for electrical devices, because the material is practically not subject to corrosion. The electrical conductivity of the metal reaches 60% of the electrical conductivity of copper conductors, although it weighs almost three times less. Therefore, the weight of aluminum wires is less compared to copper.
about processing aluminum electrical equipment
Source: https://priem-kabelya.com/priem-aljuminievogo-kabelja/aljuminij-jelektrotehnicheskij/
Aluminum scrap, types, description, prices
Recycled aluminum is a rather controversial metal: having a low cost of acceptance at points, it remains one of the most affordable types of non-ferrous scrap metal. Along with pure Al, duralumin can be distinguished among the metal wastes of this element, which has firmly entered the household and industrial spheres due to its unique combination of properties: light weight and high strength.
Branched classification of aluminum scrap
The categorization of metal waste from aluminum and its alloys is distinguished by the presence of many subgroups and a multi-level structure. Scrap metal is sorted according to the following criteria:
Class . This category is standard for each type of non-ferrous metal, including the following components: A - lump scrap, B - shavings, C - powdered waste, D - other recyclables. Aluminum scrap metal comes in three classes, excluding metal powder.
Group. The waste is divided into 10 sections, differing in chemical composition and type of alloy.
Variety Aluminum scrap is differentiated by type and shape of products.
The total number of varieties of secondary aluminum reaches several dozen.
Types of aluminum alloys accepted for scrap metal
Along with pure Al (these are considered compounds where the content of the main component is at least 99%), non-ferrous recycling points receive scrap metal with a high content of other elements: copper, silicon, nickel and others. All alloys obtained on the basis of aluminum are usually divided into two types:
- deformable, used in the manufacture of sheets, rods, wire, and other profiles;
- foundry, used for shaped casting.
Further classification of these compounds is related to the nature of the heat treatment: cold-worked, annealed, hardened or aged type of metal; as well as the chemical composition, in particular the base alloying element. Standardization GOST 1639-2009 allows us to distinguish the following types of aluminum waste, based on the presence of alloying elements:
- Unalloyed secondary metal;
- Copper. There is a distinction between scrap with a low (up to 0.5%) content of this element and a high percentage (no more than 5%) of its occurrence;
- Zinc. Includes two subgroups. The first contains products made from alloys characterized by a low level of alloying additive (less than 0.5%), including duralumin products: wire, strip products, sheets. Aircraft scrap comes here, landing gear, propeller blades, and skin material of the aircraft body, including the fuselage and wings, are accepted. The subgroup with a high (up to 6.5%) inclusion of zinc includes rolled aluminum and critical parts of aircraft from helicopters to rockets. In particular, this includes load-bearing structures of both types: welded, riveted; fuselage power units, pressed skin elements;
- Magnesium. This group includes secondary rolled aluminum and castings, the Mg content of which does not exceed 13%. This category also includes pipelines and welded tanks that have expired their service life or are unsuitable for further use. Scrap with a high level of magnesium alloying can additionally be found among components of ship equipment and its parts. Many elements of transport, rejected designs of television towers, drilling rigs are also representatives of this category.
Rolled aluminum
Mixed aluminum foundry waste is accepted separately: castings of components intended for mechanical engineering: used in the production of cars and aircraft; alloys with silicon, in particular piston scrap.
Another separate category of secondary aluminum is products containing nickel as an alloying additive. The concentration of this valuable compound at scrap metal collection points does not exceed 2.8%.
Low grade waste
This category consists of crushed scrap, both unalloyed metal and alloyed aluminum, in particular chips of various origins: turning, drilling or milling.
The only requirement for this type of waste is sorting by type of alloy: it is necessary to separate casting, wrought, and silicon-containing alloys separately. Chips consisting of different types of alloys, as well as the result of processing large profiles, are accepted separately.
The third type of aluminum shavings, handed over as an independent category of waste, is creeper shavings.
The remaining groups of low grade aluminum waste are:
- slags, foam, refining residues of metal alloys;
This is what aluminum slag might look like
- pre-molten alloys;
- cans, necessarily briquetted;
And of course, a fairly wide category of aluminum scrap is found in the household sector, in particular kitchenware: frying pans, pots, bowls, cutlery. It is gradually being replaced by stainless steel and products with a multi-layer bottom, continuing to replenish scrap metal collection points.
How do collection points classify scrap aluminum?
Above, we gave a description of aluminum scrap in accordance with GOST 1639-2009, which identifies 32 categories of aluminum scrap, designated by numbers - Aluminum 1, Aluminum 2, etc. up to Aluminum 32. Also, for each group, foreign analogues of aluminum scrap are indicated, such as: Teens, Telic, Thirl, Taldon, Tepid and others. All these groups differ in composition and quantitative content of various elements.
Each group includes certain specific grades of alloys. All this information will be only theoretical and for most ordinary people who want to sell aluminum scrap it will be superfluous. Therefore, we suggest that you familiarize yourself with the categories of aluminum scrap that distinguish scrap metal collection points:
- Electrical aluminum scrap - cable aluminum, pure, the kind that is used in electrical engineering;
Electrical aluminum scrap - pure aluminum from cable
- Food grade aluminum scrap is the most common type of scrap, pans, cans, spoons, etc.;
Food grade aluminum scrap
- Scrap aluminum profile - various window and door aluminum profiles;
Types of aluminum profiles
- Scrap aluminum profile (thermal insert) - profile with thermal insert;
- Motor aluminum scrap - speaks for itself, aluminum from engine housings;
Motor aluminum scrap
- Household aluminum scrap - various aluminum found in everyday life - door handles, aluminum from various household appliances;
scrap household aluminum in the refrigerator
- Aircraft aluminum scrap - see the article “Airplane for scrap”;
Aircraft (aviation) aluminum
- Scrap aluminum cans - everything is clear here, it is advisable to compress the cans to reduce the volume;
scrap aluminum cans
- Aluminum scrap (foil) - foil, foil waste, relevant for factories producing food packaging;
aluminum foil rolls
- Aluminum scrap (shavings) - various types of aluminum shavings;
aluminum shavings
- Scrap aluminum cable (in insulated) - any cable, in any braid;
aluminum cable insulated
Aluminum scrap prices
And lastly and most importantly, how much are different types of aluminum scrap accepted? Below are the average prices in Russia. Of course, these are not reference prices, because... in different regions of the country they can vary significantly: somewhere they can be 30-40% higher than those indicated here, and somewhere less.
| Electrical aluminum scrap | 96 RUR/kg |
| Food grade aluminum scrap | 93 RUR/kg |
| Scrap aluminum profile | 90 rub/kg |
| Scrap aluminum profile (thermal insert) | 72 RUR/kg |
| Aluminum motor scrap | 75 rub/kg |
| Household aluminum scrap | 75 rub/kg |
| Aircraft aluminum scrap | 25 rub/kg |
| Scrap aluminum cans | 62 RUR/kg |
| Aluminum scrap (foil) | 30 rub/kg |
| Aluminum scrap (shavings) | 53 RUR/kg |
| Scrap aluminum cable (insulated) | 75 rub/kg for content |
| Aluminum scrap (slag) | 63 RUR/kg per content |
Source: http://xlom.ru/vidy-metalloloma/lom-alyuminiya-vidy-opisanie-ceny/
Hand over expensive electrical aluminum at a collection point in St. Petersburg
Aluminum scrap is an excellent source for obtaining high-quality metal, but the area of use of alloys is very wide. A special metal composition has been developed for each industry, which is why scrap is divided into several main categories. Reception points work with all types of metal products, but divide the accepted products into several groups.
Aluminum cable scrap contains quality alloy, so this category is highly rated for acceptance. If you have a dismantled power cable or wires from installation installations that you are not going to use, then you can sell electrical aluminum in St. Petersburg at a high cost and make good money.
Which aluminum is classified as electrical?
Reception of electrical aluminum in St. Petersburg is carried out according to established regulations, and the price per kg upon receipt depends on the physical and chemical composition of the metal. The following products fall into the category of such aluminum:
- cables of any diameters;
- power wires;
- dismantled power plant wires;
- power cables containing aluminum conductor.
The main condition for accepting electrical aluminum is the absence of braiding and an insulating layer, which can adversely affect the composition of the metal during remelting.
How much does 1kg cost?
The price for accepting scrap electrical aluminum per 1 kg depends on the purity of the metal and the total volume of scrap. Specialists check aluminum wires for other connections, mechanical contamination, corrosion, or increased background radiation.
The best prices are offered by a point that processes raw materials independently and does not involve intermediaries to carry out preparatory work. If you want to sell scrap metal and get the maximum value for 1 kg of aluminum scrap, then you need to do some preparatory work.
Inspect the aluminum scrap for oxidation, corrosion or contamination, which are checked first. You need to remove all factors that will reduce the value of the aluminum cable upon acceptance: strip the aluminum wire of insulation and braid, leaving only the conductive core.
Where is it profitable to submit in St. Petersburg
You can sell electrical aluminum on favorable terms in St. Petersburg at a high price in our company. Our collection point extracts useful resources using our own equipment, so you can hand over any amount of aluminum at a high cost and get a good income.
We accept electrical aluminum on the most favorable terms, and you can deliver aluminum wires of any diameter or purpose.
Before visiting us, make a follow-up call. Prices at the point may be different, without a prior call on your part.
Source: https://metall1.ru/priem-ehlektrotekhnicheskogo-alyumiya-tsena
Application of aluminum in electrical engineering. Articles of the company "LLC Firma
Aluminum is widely used in the electrical industry. The conductivity of aluminum is less than that of copper, but its cost is less. Ease of processing, light weight, corrosion resistance - these and other qualities are its priority qualities
Many designers and designers at electrical industry enterprises are accustomed to working with copper and steel, considering them the most suitable materials for the job. However, recently the cost of aluminum has not increased as quickly as the cost of steel and copper.
For this and for some other reasons that we will write about in this article, many manufacturers are switching to aluminum.
If we compare the physical characteristics and economic indicators of these materials, it is obvious that aluminum displace other metals in the electrical engineering market.
For an electrical designer, the priority qualities of the materials used are their density, electrical conductivity, strength, thermal expansion and corrosion resistance.
Electrical characteristics
Annealed copper has a conductivity of 100% IACS. (IACS – comparative unit of electrical conductivity). Aluminum alloy AD0 has a conductivity of 61% IACS, which means that conductivity similar to copper will be provided with a larger volume and cross-sectional area of aluminum. Considering that aluminum weighs significantly less than copper, a larger aluminum conductor will be 3 times lighter than copper.
This means that 1 kg of aluminum is equivalent in conductivity to 3 kg of copper. We can conclude that if there are no special requirements for the dimensions of the conductor, aluminum . It should also be taken into account that copper is a rather expensive material, its cost is approximately 3 times higher than the cost of aluminum.
There are frequent cases of theft of expensive non-ferrous metals, which is why copper products also require additional security or protection from burglary.
Strength
Copper and steel are superior to aluminum in strength, but aluminum can be strengthened by alloying and thermomechanical processing.
Aluminum alloys also have another advantage - thanks to pressing technology, it is possible to obtain products of almost any shape, which is not possible for steel blanks.
This is why aluminum products can perform better structurally than metal elements. Steel is used only in cases where mechanical strength plays the most important role - for example, railway or tram rails.
Corrosion resistance
The surface of aluminum products does not require painting or coating with other metals, which distinguishes it favorably from steel. In electrical engineering, aluminum alloys of technical purity are used, containing a minimum amount of impurities. These are alloys AD0, AD31, AD35 and their European analogues (6060 and 6082). These alloys are similar in characteristics and differ in strength. The most durable of them is AD35, AD0 is more ductile, but less durable.
A natural layer of aluminum oxide protects the material from interaction with air and oxidation. This layer itself regenerates in case of any damage to the surface. Steel, of course, does not have this property; steel is susceptible to corrosion and is quite short-lived without painting.
Aluminum profiles
Street and Highway Poles - Extruded aluminum are superior to metal poles in many ways: lighter weight, lower strength-to-weight ratio, appearance, corrosion resistance, safety. Also, low weight facilitates installation work and reduces transportation costs. Also, aluminum alloys used in electrical engineering are excellent at welding and cutting.
Electrical busbars - For all types of busbars, extruded aluminum is used if there is enough space to accommodate them, since their cost is much less and they are more ductile. Electrical busbars are not made from all aluminum alloys; alloys AD0, AD31 and AD35 are used for them. Most often, electrical busbars are made of alloy 6060 T6 or AD31T.
Cable lugs and sleeves and cable channels are made from extruded aluminum pipes. Compared to ferrous metal or plastic products, they compare favorably in strength, conductivity, cost, corrosion resistance and ease of machining.
Electrical substation cabinets. The use of aluminum profiles is more profitable than galvanized profiles due to minimal maintenance, strength, corrosion resistance, and low weight (which is important for high-rise work and installation). Aluminum profiles and sheets are easy to cut and drill directly on site and do not require painting.
For the same reasons, distribution traverses for electric poles are often made from aluminum, for example, as in the photo:
Extruded aluminum plate radiators for heat dissipation (“combs”) show excellent results due to excellent thermal conductivity, low weight, low stage. Aluminum pressing technology makes it possible to obtain fairly thin plate-ribs.
Source: https://firma-tera.com.ua/a252807-primenenie-alyuminiya-elektrotehnike.html
Application of aluminum in electrical engineering
Aluminum and its alloys are widely used in modern electrical engineering. In many ways, this fact is justified by the cost of the metal itself and its technical characteristics.
Aluminum sheet quintet can be ordered without leaving home. High-quality aluminum can compete with more electrically conductive materials due to its availability.
Classification of aluminum in electrical engineering
Aluminum can be divided into specific classes based on its electrical resistance:
- conductive;
- alloys with increased resistance.
In particular, the A7E and AE5 alloys have an electrical conductivity of 60% of that of copper (the undisputed leader in electrical engineering).
Despite this, the use of aluminum in industry continues to gain momentum. Today, this metal is used for the production of wires and cables, as well as high-voltage buses.
It is necessary to understand that aluminum is the first metal on the list, if we consider it by its prevalence in the earth’s crust. Moreover, aluminum is the second most abundant element after oxygen.
The most common alloys in industry
Leadership is held by duralumin (duralumin, duralumin). This alloy was named after the German city where it was first obtained. Its characteristics are ensured by the presence of copper, magnesium and manganese. High strength combined with lightness ensured its scope of application in aviation, shipbuilding and transport engineering.
Magnalium is an alloy of aluminum and magnesium. It has high resistance to corrosion. Can compete with stainless steel in this indicator. However, magnalium is much lighter than it.
These characteristics have led to an increase in the cost of magnalium. It is used in the automotive industry.
In conclusion, it is worth saying that over the past five years, aluminum consumption has increased by 3.5 million tons. New applications continue to emerge.
Metallurgists continue to look for new combinations that will allow them to use aluminum more efficiently, both from a technical and financial standpoint.
Source: http://euroelectrica.ru/primenenie-alyuminiya-v-elektrotehnike/
Classification of aluminum scrap upon delivery
The Tekhnolom company accepts aluminum scrap at a competitive price and works with legal entities and individuals. Special conditions are provided for cooperation with large volumes; payment can be made upon delivery in cash or by bank transfer.
Characteristics of aluminum scrap
Many people want to sell scrap aluminum, since metal waste is generated during production, the output of household appliances, construction equipment and tools. Recycling gives a second life to products in many areas, the demand is due to the following characteristics:
- the metal is very soft, ductile, it is convenient to make a variety of things from it;
- the appearance of aluminum is attractive;
- easily combines in alloys with many metals.
The price for receiving aluminum in Moscow depends on many criteria: volume, type and general condition; you can get detailed information by calling the managers of the Tekhnolom company.
Classification
Acceptance of expensive aluminum in Moscow can be carried out if the product is not damaged, large or in good condition. First of all, scrap is divided into categories:
- pieces;
- shavings;
- other metal waste.
The last part includes foil, including food foil; it is used for packaging food and preparing food. Other metals also contain powder, but aluminum does not accept such scrap.
The price for purchasing aluminum scrap depends on many factors; the type and shape of the products must be taken into account. Reception of aluminum is expensive if the costs are divided correctly by group. Here the composition of chemical elements and the amount of metal in the alloy are taken into account.
Why donate metal?
Many people don’t understand why buying scrap aluminum is necessary, but the price is quite impressive for simple waste. This is an easily recyclable metal, from which in the future you can produce many products needed for everyday life, the food industry, in particular for packaging, as well as for the automotive and aviation industries.
Buying aluminum scrap further divides all the metal into deformable and castable types. The first is necessary for profiles, sheets, tubes and other things. The second is used to make shaped castings.
Any metal thing can easily get a second life. After purchasing, they are melted down and used as raw materials in various factories in industry in a variety of fields.
Where to submit?
The Tehnolom company accepts metal in any quantity. Here you can donate a few kilograms, if you just feel sorry for throwing away some things, or if a large wholesale supply is possible. It is important to pay attention to the fact that aluminum is almost everywhere. These can be wires, the main thing is to free them from the windings, machine parts and other equipment, as well as various metal packaging.
When handing over, you must remember that this is an extremely light metal; with a large volume, the weight turns out to be relatively small. Knowing this, the company sets an acceptable price at which it is most profitable to dispose of metal waste. You can also order scrap removal; you don’t have to look for transport and go out on your own to find a collection point. Every client will find excellent service and good attitude at Tekhnolom, and the prices will pleasantly surprise clients.
Tekhnolom company - purchase of non-ferrous metals in Moscow.
| Prices for large quantities of metal (from 300 kg) are negotiable. Please call and check. From 1000 kg - export. | |
| Name | price per kg, rub |
| off-grade copper | 360 |
| copper piece | 370requirement |
| copper glitter (without oil) | 380 requirement |
| copper shavings | 230 |
| brass | 210 |
| brass ls59-ls63 (piece) | 225 |
| copper-brass radiators | 215 |
| bronze | 240 |
| off-grade aluminum | 60 |
| electrical aluminum | 90 |
| aluminum profile (pure, without iron) | 85 |
| food grade aluminum | 85 |
| aluminum motor | 63 |
| aluminum radiators | 55 |
| aluminum can | 40 |
| aluminum sheets (offset printing) | 85 |
| zinc anode (carburetor scrap) | 100p. 65p. |
| stainless steel 10% | 65 |
| stainless steel 8% | 50 |
| Stainless steel is oversized. | 45 |
| titanium | 170 |
| tin | 1200 |
| pos30, 40.60 (solder) | 1100p.per interest |
| lead cable | 107 |
| lead cable dirty | 100 |
| lead remelting | 90 |
| lead car weights | 50 |
| used polypropylene batteries UPS | 50 |
| used ebonite batteries | 40 |
| used batteries TNZh NK | 30 |
| Quick cutter P9 P12 P18 P6M5 | from90-200 |
| nickel | 700 |
| nichrome 60-80% | 400 |
| antimony | 450 |
| molybdenum | 1250 |
| tungsten scrap | 1200 |
| VK, TK | 950 |
| niobium | Expensive |
| cobalt | Expensive |
| bismuth | 450 |
| babit 16.83 | 150-1000 |
Source: http://www.tehnolom.ru/content/klassifikaciya-loma-alyuminiya-pri-sdache
Aluminum in electrical engineering
It so happened many years ago that most engineers, designers and designers in the electrical industry considered copper and steel to be practically the only materials with which they could work. This is due, in particular, to the fact that at the end of the 19th century, when the electrical industry was emerging, there was practically no available aluminum.
Currently, the situation is completely different: the world produces about twice as much aluminum as copper, and aluminum production volumes are second only to steel production volumes.
In recent years, steel and copper prices have risen significantly faster than aluminum prices. As a result, some consumers who traditionally used copper are switching to aluminum. However, a comparison of the physical and economic characteristics of these metals “screams” that there should be much more replacement of steel and copper with aluminum. It is therefore not surprising that the use of aluminum in the electrical industry is steadily increasing.
Properties of the material as an electrical conductor
For an electrical engineer, the most important properties and characteristics of materials are:
- density,
- electrical conductivity,
- strength,
- thermal expansion and
- corrosion resistance.
Comparison of aluminum, steel and copper
Density (g/cm3) :
Aluminum 1350: 2.70Steel: 7.86
Copper (annealed): 8.93
Volume Conductivity (%IACS):
Aluminum 1350: 61Steel: 8
Copper (annealed): 100
Conductivity (per unit mass):
Aluminum 1350: 100%Steel: 4%
Copper (annealed): 50%
Tensile strength (MPa):
Aluminum 1350: 125Steel: 300
Copper (annealed): 235
Yield Strength (MPa):
Aluminum 1350: 110Steel: 170
Copper (annealed): 104
Linear thermal expansion (10-6 m/m °C):
Aluminum 1350: 22Steel: 13
Copper (annealed): 17
Electrical properties
Annealed copper has a conductivity of 100% IACS. The abbreviation IACS stands for International Annealed Copper Standard, a comparative unit of measurement for electrical conductivity. Aluminum 1350-N116 (AD0E according to GOST 4784-97) has a conductivity of 61% IACS, that is, conductivity equivalent to copper will be achieved with a larger aluminum cross-section.
However, since aluminum is much lighter than copper, this enlarged aluminum conductor will weigh half as much as copper (8.93 / 2.70 × 0.61 = 2.02). As a result, one kilogram of aluminum will provide the same conductivity as two kilograms of copper.
Therefore, when there are no strict restrictions on the size of the conductor, aluminum is increasingly used instead of copper for conductive busbars, cables and wires.
Corrosion resistance
Unlike steel, the surface of aluminum does not need to be painted or coated, for example, with zinc, and then ensure that it does not rust. The natural aluminum oxide layer insulates the metal from further contact with air and prevents further oxidation. At the slightest damage to this layer, it instantly repairs itself.
Misconceptions and Myths
Aluminum conductors are quite reliable. All power line wires are aluminum. They have a long-standing reputation for reliable service.
However, back in the 60-70s of the last century, an opinion was formed about problems with aluminum wiring in residential buildings and apartments, in particular, the possible overheating of their connections.
Thorough studies of this issue, for example, in Canada, have shown that aluminum wires are not special in this sense: if handled incorrectly, any wires can overheat. Moreover, in hundreds of thousands of homes and apartments around the world, aluminum wires continue to work.
Another thing is that in the 60-70s no one imagined that houses and apartments would be so “stuffed” with electrical appliances: the cross-sections of aluminum wires could have been thicker.
Street and highway lighting poles
Extruded aluminum poles have advantages over, for example, steel poles due to their lighter weight, lower strength-to-weight ratio, good appearance, long-term corrosion resistance, low maintenance costs, and greater safety, especially when using special safety bases.
When a car hits such a pole at high speed, the base is destroyed and allows the pole to move along with the car. This reduces the impact force on the vehicle and the degree of injury to the driver and passengers.
This base is so “cunningly” designed that it is destroyed by an impact with a pole, but withstands wind loads acting on the pole.
Busbars
For all types of tires, extruded aluminum is used where space for their placement allows, since they are, first of all, much cheaper and also much easier to bend (Figure 1).
Picture 1
Cable lugs and sleeves
Cable lugs and sleeves made of extruded aluminum pipes have advantages over their steel or plastic counterparts in strength, conductivity, cost, corrosion resistance and ease of machining (Figure 2).
Figure 2
Channels for cable routing
Cable ducts are increasingly being made from extruded aluminum rather than steel or plastic because they provide sufficient strength, are lightweight, highly corrosion resistant, non-magnetic and fire resistant (Figure 3).
Figure 3
Electrical substation cabinets
Aluminum profiles are preferable to, for example, galvanized steel due to minimal maintenance, strength, corrosion resistance, and low weight (especially when installed in the field and at height). Aluminum profiles and sheets are easy to cut and drill directly “in place”, and most importantly, they do not need to be painted to protect them from corrosion.
Distribution traverses of electric poles
Extruded aluminum utility pole distribution bars (those that are horizontal) provide the necessary strength while being lightweight and maintenance-free.
Radiators-combs
Pressed aluminum plate radiators for heat dissipation (“combs”) are very effective due to their high thermal conductivity, low weight, and low cost.
The main advantage of aluminum is its ability to be pressed into many very thin ribs (Figure 4). Figure 4
Coaxial cable
The outer conductor of a coaxial television cable is most often made not from a copper pipe, but from a cheaper aluminum pipe. The manufacturing technology of such a cable is presented in Figure 5.
Figure 5
Source: https://aluminium-guide.ru/primenenie-alyuminiya-v-elektricheskoj-promyshlennosti/
Aluminum
Aluminum belongs to the group of light metals.
The most common metal and the third most abundant chemical element in the earth's crust (after oxygen and silicon).
Aluminum has high thermal and electrical conductivity and resistance to corrosion due to the rapid formation of strong oxide films that protect the surface from further interaction.
Story
Aluminum was first discovered by the Danish physicist Hans Oersted in 1825. The name of the element is derived from Lat. alumen - alum.
Before the discovery of an industrial method for producing aluminum, this metal was more expensive than gold. In 1889, the British, wanting to honor the great Russian chemist D.I. Mendeleev with a rich gift, presented him with scales made of gold and aluminum.
By order of Napoleon III, aluminum cutlery was made, which was served at ceremonial dinners for him and the most honored guests. Other guests used gold and silver utensils.
Then cutlery made of aluminum became widespread, but nowadays they can still be seen only in some catering establishments - despite the assurances of many experts about the harmfulness of aluminum to human health. In addition, such devices lose their color and original shape over time due to the softness of aluminum.
The fashion for jewelry made of aluminum immediately passed when new technologies for its production appeared, reducing the cost many times over.
Application
Widely used as a construction material.
The main advantages of aluminum in this quality are lightness, malleability for stamping, corrosion resistance (in air, aluminum is instantly covered with a durable Al2O3 film, which prevents its further oxidation), high thermal conductivity, and non-toxicity of its compounds.
In particular, these properties have made aluminum extremely popular in the production of cookware, aluminum foil in the food industry and for packaging. The first three properties have made aluminum the main raw material in the aviation and aerospace industries.
The main disadvantage of aluminum as a structural material is its low strength, so to strengthen it it is usually alloyed with a small amount of copper and magnesium (the alloy is called duralumin).
The electrical conductivity of aluminum is only 1.7 times less than that of copper, while aluminum is approximately 4 times cheaper, but due to its 3.3 times lower density, to obtain equal resistance it needs approximately 2 times less weight.
Therefore, it is widely used in electrical engineering for the manufacture of wires, their shielding, and even in microelectronics for the manufacture of conductors in chips.
The disadvantage of aluminum as an electrical material is the presence of a strong oxide film, which makes soldering difficult and, due to greater resistance, causes increased heating at the electrical connections - which, in turn, negatively affects the reliability of the contact and the condition of the insulation.
Source: https://allitec.ru/zakupka-metalloma/tsvetnoj-lom/aluminum
Reception of electrical aluminum - price per kg is higher than the market price
Aluminum is one of the most common metals in modern industry. One of the main characteristics of the compound is the ability to recycle old products to extract pure raw materials. The acceptance of electrical aluminum in Moscow buys cleaned aluminum cables that have already expired and must be replaced according to fire safety rules.
How much does 1 kg cost, a ton today?
If you want to sell electrical aluminum at a high price for scrap, then you need to do some preparatory work with the aluminum cable.
- Dismantling. Aluminum cable has a limited service life, and after its service life has expired, it is necessary to dismantle the old cable. These products can be returned to a collection point.
- Cleaning. To sell aluminum scrap at a high price, you need to clean it of insulation and sheathing.
- Finding a buying point. You can bring the metal yourself to the collection point or call an employee of a processing company to analyze and remove aluminum raw materials.
The current cost of 1 ton of scrap electrical aluminum for purchase is calculated on the basis of market prices for the metal and depends on the quality of the raw materials themselves.
Real prices
* We do not publish advertising (inflated) prices. Only the real cost of the purchase!
Reception of electrical aluminum
Electrical aluminum (in oil)
75 RUR
85 RUR
90 rub
up to 102,000 rub.
The purchase of electrical aluminum at our collection point is carried out on the most favorable terms for individuals and legal entities. The Interlom company guarantees an objective analysis of aluminum scrap and acceptance of the metal at an attractive price.
At our collection point we accept electrical aluminum in a comprehensive manner. This offer will be especially interesting to customers with large volumes of metal.
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-elektrotexnicheskogo-alyuminiya
Aluminum electrical scrap
Windings of transformers or motors, cables or wires of high-voltage transmission lines, incandescent lamp sockets and much more - today electrical aluminum scrap is found in a wide variety of production areas. Meanwhile, having unique properties, instead of simply polluting the territory with useless trash, such scrap can bring additional income to the enterprise. Why is it so valuable?
Properties of electrical aluminum
Just like copper, aluminum is in high demand in electrical engineering. Moreover, due to similar electrical conductivity, the use of aluminum is more rational than the use of copper. This is explained by the fact that electrical aluminum has the following properties:
- — good resistance to corrosion;
- - lower price (compared to copper);
- - low specific gravity.
A wire made of aluminum, in comparison with copper, with similar current resistance values, has significantly less weight. Due to these properties, aluminum is actively used in the manufacture of high-voltage wires, contact terminals, electrical busbars, and electrical cables.
Profitable and comfortable cooperation
It happens that in fact, on the territory of many enterprises or in utility rooms, electrical scrap, the price of which remains at a constantly high level, lies as a dead weight, occupying useful space. With the help of our company, such scrap can turn from annoying garbage into additional income for an enterprise with minimal investment of time and effort!
The Metem company offers you to receive all the benefits of cooperation with professionals:
- — favorable prices for the scrap offered;
- — having your own fleet of vehicles, as well as the ability to go to the scrap storage site to make your work as easy as possible;
- — efficiency of evaluation and execution of the transaction;
- — individual approach to the client.
High professionalism and attractive prices are the advantages of profitable cooperation with the Metem company!
Source: http://www.metem.su/katalog/alyuminij/lom-alyuminiya-elektrotehnicheskij/
Electrical aluminum
Positions Non-cash From 300kg To 300kg To 100kg| Aluminum Electrical | 104 | 98 | 90 | 85 |
Aluminum is a light silver-white metal, characterized by high electrical and thermal conductivity, corrosion resistance and good ductility, therefore it is widely used in everyday life and in production, including various types of cables, wires, terminals, transformer busbars, windings and etc. The aluminum from which they are made is called electrical, contains very few impurities, therefore it is convenient for further recycling and is always in preferred demand at scrap metal collection points. Thus, recycling old electrical products, which are in abundance around, is not only environmentally beneficial, but also significantly beneficial. By the way, the cost of electrical scrap has been remarkably stable over several decades and fluctuates slightly around one euro per kilogram.
Electrical aluminum scrap
There are several types of aluminum scrap:
- electrical scrap aluminum (wires, cables, terminals, tires);
- household (dishes, various containers, door and window frames);
- technical (mainly parts of various mechanisms).
The price for electrical aluminum scrap is traditionally higher than for other types of aluminum scrap. When planning to hand over existing electrical scrap metal, it is worth knowing a few nuances:
- Usually, wires and cables have plastic insulation, while purchases either do not accept such raw materials at all, or accept them at a significant discount, up to 50%. The insulation is removed only mechanically; when trying to burn it, electrical aluminum, the melting point of which is quite low - 660 degrees, melts, changes its structure and is not accepted for purchase in this form;
- a bundle of high-voltage wire strands sometimes contains steel inside; a discount when purchasing such scrap metal is given for unraveling;
- the price of electrical scrap may be lower due to its contamination (oil, resin, paint).
The collection and recycling of scrap metal in general, and electrical aluminum in particular, in addition to the good purpose of cleaning the environment from the products of our technogenic civilization, is quite a profitable activity.
Scrap of non-ferrous metals is constantly in demand at recycling collection points and a decline in this demand is not expected in the near future, rather the opposite.
Earning money from collecting and delivering scrap metal to collection points does not require any specific knowledge and skills; this activity in the form of extra work is available to anyone and does not contradict existing legislation.
Reception of electrical aluminum
You can hand over aluminum and other scrap metal by contacting our company; we welcome every client, both wholesale and retail. “We weigh to the gram, calculate to the penny” - this is our motto and strategy in business.
Source: http://romett.ru/elektrotekhnicheskij-alyuminij
Aluminum tires: characteristics of raw materials, production features and prices
Aluminum is a lightweight, non-toxic metal with excellent mechanical and anti-corrosion properties; it is distinguished by its resistance to negative external influences and durability.
In industry, aluminum alloys with the addition of copper, manganese, zinc, magnesium and silicon are used to produce various products, in particular, aluminum tires, which are widely used in various sectors of the national economy.
In this review, we will look at the technical characteristics, sizes, features and production methods, as well as areas of application and current prices for aluminum tires.
Technical parameters and sizes of aluminum tires
An aluminum bus is a rectangular profile with a thickness of 3–12 mm, a width of 10–180 mm and a radius of rounding of the cross section of 1–8 mm. These products are made in the form of strips of unmeasured length or multiples of measured length (from 3 to 9 meters). They are sold in coils, coils and bundles. According to the degree of strength, aluminum tires are divided into:
- normal strength (such products do not have additional symbols in their designation);
- increased strength (the designation PP is added to the name).
The name of the product includes the grade of metal (pure or alloy), information about heat treatment, type of strength, dimensions and GOST in accordance with which it is manufactured. Thus, a strip of the AD0 brand with a cross-section of 5x50, in a coil, which has not undergone heat treatment, of unmeasured length, will have the following name: AD0 5x50 BT GOST 15176. And a product of the AD31 brand with a cross-section of 5x50, which has undergone heat treatment and has a length of 9000 mm, will be marked as follows : AD31 T 5x50x9000 GOST 15176.
The popularity of aluminum products is determined by their technical characteristics. So, the main advantages of tire products made from this material include:
- high resistance to corrosion, which lasts throughout the entire period of use of the product (from 25 years);
- excellent electrical conductivity;
- light weight of aluminum tire (density of pure material and alloys - 2.71 g/cm3);
- non-magnetic and plasticity, allowing for use in rigid conductors and distribution equipment;
- attractive appearance, allowing you to try on products for decorative finishing of equipment and vehicles.
Aluminum tire production
The production of aluminum strips is carried out in accordance with GOST 15176-89 and GOST 8617-91. The chemical composition of alloys is specified in GOST 4784-97. Sample preparation to determine the chemical composition of the material is carried out in accordance with GOST 24231-80, and anti-corrosion protection, packaging, transportation and storage - in accordance with GOST 9.510-93.
These standards regulate the production and storage of aluminum products AD00, AD0, A5, A5E, A6, A7, as well as AD31 and AD31E alloys. Each of these materials has its own advantages that determine the area of use. Now the most widely used:
- AD0 is pure aluminum with virtually no impurities. It has increased ductility, but lower resistivity than alloys.
- AD31 is an alloy containing magnesium and silicon, characterized by maximum strength. Moreover, this material has lower electrical conductivity than technical aluminum. The resistivity indicator reaches 0.033 Ohm*m.
To increase the strength of flexible aluminum busbars, various heat treatment methods are used, and to ensure maximum corrosion resistance, the products are painted or anodized. Aluminum strips are easy to process, in particular, they are easy to weld and cut.
Note:
The widespread use of aluminum strips for the installation of busbars and switchgears is explained by their high electrical conductivity. Due to this property, such tires are often called electrical tires.
Aluminum tires are produced by hot casting or stamping on solid dies. Then the products undergo processing, which results in rolled products:
- Hot-pressed, that is, not subjected to heat treatment (does not have special designations).
- Hardened and naturally aged (designated T).
- Hardened and artificially aged (designation T1).
- Not completely hardened and artificially aged (designation T5).
Heat treatment has a significant impact on the mechanical properties of the product. Thus, a strip made of hardened and artificially aged metal has a tensile strength approximately 1.5 times greater and a yield strength 2.5 times higher than a naturally aged analogue.
Areas of application
Aluminum strips are universal products that have a wide range of applications. Most often they are used when installing busbars - high-voltage current conductors (the current in busbars can reach 250–630 A, and the voltage can reach several thousand volts). These products are also used in the energy sector, mechanical engineering and construction, in particular, in the manufacture of input distribution devices, profiles and equipment housings.
AD0 brand tires and products made of aluminum alloys are indispensable for the installation and finishing of ceiling systems, partitions, panel and curtain facades, and outdoor advertising structures. They provide sealing of seams on pipes and air ducts, increasing protection against the penetration of dust and dirt.
By the way,
due to their non-toxicity, aluminum tires 120x10 and other sizes are used in residential premises, offices and public places. They are also used in the manufacture of food containers.
The excellent anti-corrosion properties of these products make it possible to use them outdoors and under conditions of constant negative external influence. For example, they are widely used in chemical, gas and oil refineries where hydrogen sulfide and other corrosive substances are present in the air.
The excellent reflectivity and pleasant appearance of this product allow it to be used to create finishing elements for ground and air vehicles. The light weight of the strips makes them indispensable elements of those products for which weight is an important factor.
Aluminum tire prices
One of the main reasons why you should buy an aluminum electrical busbar is the price of the product. Affordable cost and high electrical resistivity distinguish aluminum products from copper products, which have similar technical parameters. The difference in the price of products made from these metals can reach 3–4 times. But this is not explained by the low quality of aluminum, but by the availability of the raw materials from which it is made.
The cost of aluminum strip is set per linear meter of the product and is determined by the section size and alloy grade. Some companies calculate the prices of goods based on their weight.
Aluminum tire AD31 3x25 can be purchased in bulk at a price of 36–39 rubles/linear meter. The cost of an AD0 brand product is approximately 43–45 rubles/linear meter.
For the same brands, but with different product sizes, the price of the products is as follows:
- 4x40 - 71–78 and 90–95 rubles/linear meter, respectively;
- 8x80 - 271–315 and 360–365 rubles/linear meter;
- 10x120 - 530–590 and 670–700 rub./linear meter.
You can purchase an aluminum tire at retail at a price that is on average 10–15% higher than the wholesale price.
Thus, aluminum tires AD31 and AD0 are widely used in industry due to their excellent performance, durability, safety and affordable cost. They can be used to solve a variety of problems: from creating busbars to decorative finishing of aircraft. Ordering aluminum tires at a competitive price is the best solution for your business.
Source: https://www.kp.ru/guide/aljuminievye-shiny.html
Aluminum and its alloys used in electrical engineering - News - 2020
Aluminum and its alloys used in electrical engineering (photo by Daniel Richert @ Flickr)
Introduction
Aluminum has been used for many years as a conductor material in virtually all electrical . In addition to pure aluminum, several of its alloys are also excellent conductors, combining structural strength with reasonable conductivity.
Aluminum is used throughout the electrical industry. Motors are wound with it, high voltage lines are made with it, and the drop from the power line to your home's breaker box is probably aluminum.
The material is lighter than copper ( about one-third the density ) and therefore easier to process; it is also cheaper .
Another advantage is that its price does not fluctuate widely like copper. The 1960s and 1970s saw a sharp rise in copper prices around the world. This has led to many uses of aluminum in situations where copper was previously the norm.
In some applications, such as domestic electrical wiring and transformer foil windings described below, aluminum proved less suitable than originally hoped, so there was some return to copper in the late 1990s, and aluminum use generally limited to those applications , for which it is clearly superior.
There are two groups of British Standard Specifications for aluminum:
- One coating aluminum for electrical purposes , which refers to high purity aluminum with an emphasis on electrical properties and
- The second question concerns aluminum for general engineering .
Aluminum for electrical purposes covers grades with conductivity between 55% and 61% International Copper Rolling Standard ( IACS ) and includes pure aluminum.
Below are the relevant British Standards:
- BS 215 Part 1: (IEC 207) Aluminum stranded conductors for overhead power lines.
- BS 215 Part 2: (IEC 209) Steel-reinforced aluminum conductors for overhead power lines.
- BS 2627. Wrought aluminum for electrical purposes - wire.
- BS 2897. Wrought aluminum for electrical purposes - strip with painted or rolled edges.
- BS 2898. Wrought aluminum for electrical purposes - rods, extruded round tubes and sections.
- BS 3242. (IEC 208) Aluminum alloy stranded conductors for overhead power transmission.
- BS 3988. Wrought aluminum for electrical purposes - solid conductors for insulated cables.
- BS 6360. Specifications for conductors in insulated cables and cords.
This specification group includes pure aluminum grade 1350 (formerly 1E) with a conductivity of 61% IACS and grade 6101A (formerly 91E), which is a heat-treated alloy with moderate strength and conductivity 55% IACS.
Aluminum for general engineering includes grades with conductivity up to 30% IACS , but with high structural strength, up to 60% of steel , with greater attention to mechanical properties.
This applies to the following British Standards:
- BS 1471 Wrought aluminum and aluminum alloys - draft tube.
- BS 1472 Wrought aluminum and aluminum alloys—forgings and forgings.
- BS 1473 Wrought aluminum and aluminum alloys - rivet, bolt and rod.
- BS 1474 Wrought aluminum and aluminum alloys - rods, extruded round tubes and sections.
- BS 1475 Wrought aluminum and aluminum alloys - wire.
- BS 1490 Aluminum ingots and castings (based on ISO but not identical to ISO 3522).
- BS EN 485 Aluminum and aluminum alloys - sheet, strip and plate.
This group of specifications includes grade 1050A (formerly 1B) with a conductivity of 61.6 IACS, grade 1080A (formerly 1A), also with a conductivity of 61.6 IACS, and grade 1200 (formerly 1C) with a conductivity of 59.5% IACS. These grades are typically used in sheet form up to 10mm thick or slab over 10mm thick .
More detailed information on aluminum grades and technical characteristics can be obtained from the Aluminum Federation.
Busbars
Aluminum has been used for busbars for over 60 years, and has been increasingly used for a wide range of busbar applications since 1960 due to its light weight and durability .
Tubular aluminum is used exclusively for 275 kV and 400 kV substation busbars (Gas Insulated Transmission Line - GIL) and is increasingly being used at 132 kV for substation renovations and renovations.
Aluminum is used in large industrial plants such as smelters and electrochemical plants due to the presence of large sections of cast strips (up to 600 mm × 150 mm). Aluminum is also used in switchgear and growing core systems due to its lighter weight compared to copper.
The main problem with aluminum is the rapidity with which it oxidizes once the surface is prepared for bolting. Much of the research was included, especially with high currents occurring between the generator and its associated step-up transformer. This has led to significant improvements in joining methods.
Bolted connections in aluminum busbars that are subject to frequent dismantling are often galvanized using silver or tin.
cable
Aluminum is widely used as conductors with a cross-section of 16 mm 2 for power cables up to 66 kV . Aluminum is not typically found in residential electrical installations due to the special bonding and termination techniques required to ensure long-lasting, trouble-free service.
Air lines
ACSR reinforcement conductors are used throughout the world for power distribution systems.
Acar (aluminum alloy reinforced aluminum conductor) has been increasingly used since 1960 due to the elimination of the risk of bimetallic corrosion and increased conductivity for a given cross-section. Acar conductors for overhead wire support are also finding favor with railway authorities for power transmission schemes at the upper end due to their lighter weight and reduced risk of theft compared to copper.
Motors
Core rotors for induction motors often use aluminum rods. The housings are also made of the material, as are the fans used to cool the engine.
Foil windings
Aluminum is the norm for capacitor windings from the smallest types used in lighting fixtures to high power capacitors .
Foil windings are suitable for some transformers, reactors and solenoids. The foil thickness ranges from 0.040mm to 1.20mm in 34 steps . This results in a better space ratio than wire-wound copper, with aluminum conductor taking up about 90% of the space versus 60% for copper wire.
Heating and cooling are provided by better space factor and less insulation required around the foil wrap. Fast radial heat exchange ensures an even temperature gradient.
The disadvantage of aluminum is its lower mechanical strength , especially from the point of view of making winding end connections .
The trend has therefore been to turn to the use of copper foil for air insulated low voltage windings.
Aluminum foil, however, is almost exclusively used for HV windings of cast resin transformers, as it has a coefficient of thermal expansion similar to that of copper, which thus reduces the thermal stresses generated by the load.
Constants and physical properties of very high purity aluminum
| Description | Price |
| Atomic number | 13 |
| Atomic volume | 10 cm 3 / g-atom |
| Atomic weight | 26, 98 |
| valence | 3 |
| Crystal structure | GCC |
| Interatomic distance (coordination number 12) | 2.68 kX |
| Heat of combustion | 200 k cal/g-atom |
| Latent heat of fusion | 94.6 cal/g |
| Melting temperature | 660, 2oC |
| Boiling point | 2480oC |
| Vapor pressure at 1200 °C | 1 × 10 -2 mm Hg. Art. |
| Average specific heat capacity (0-100°C) | 0.219 cal/g °C |
| Thermal conductivity (0-100°C) | 0.57 cal/cm s °C |
| Temperature coefficient of linear expansion (0-100°C) | 23.5 × 10 -6 per °C |
| Electrical resistance at 20°C | 2.69 µmh |
| Temperature coefficient of resistance (0-100°C) | 4.2 × 10 -3 per °C |
| Electrochemical equivalent | 3.348×10 -1 g/A |
| Density at 20°C | 2.6898 g/cm3 |
| Elastic modulus | 68.3 kN/mm2 |
| Torsion modulus | 25.5 kN/mm2 |
| Poisson's ratio | 0, 34 |
Heating elements
Aluminum foil units have been developed but are not currently widely used. Applications include film film wallpaper , concrete curing , and possibly soil warming .
Coolers
Aluminum's high thermal conductivity and ease of extrusion or casting into solid or hollow shapes using integral fins make the material ideal for radiators.
https://www.youtube.com/watch?v=goVmAmDKRjo
Semiconductor devices and transformer capacitances illustrate the wide variety of applications in this field. Its light weight makes it ideal for stationary transformer tanks, and it has the added benefit that the material does not react with transformer oil to form sludge.
Resource: Newnes Electrical Pocket Book - EA Reeves;
Martin J. Heathcote (Get this book at Amazon)
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Source: https://ru.electronics-council.com/aluminum-its-alloys-used-electrical-engineering-60459
