What is galvanized sheet

Roofing made of galvanized steel: what galvanization is, materials and tools for installation

Galvanized smooth sheet is the topic of this material, in which we, together with an expert, will consider issues such as: production features and characteristics of this category of materials, as well as areas of application.

Steel sheet is a common and relatively inexpensive material, but unfortunately, it is prone to corrosion.

Galvanization allows you to eliminate this disadvantage. The process involves applying a layer of zinc with a thickness of 0.02 mm to the surface. Galvanization makes the metal resistant to the negative effects of aggressive environments, including the formation of rust.

As a result of processing, a building material with excellent technical and operational properties is obtained - galvanized smooth sheet.

Features of galvanized steel roofing

As a rule, galvanized steel is used to cover gable roofs of private buildings, the slope of which is 18-30 degrees. At a smaller angle, water will flow down the slopes slowly, which will contribute to corrosion of the material.

Laying of galvanized steel is carried out on a wooden sheathing, created on the basis of various lumber: boards, bars, slabs. The last option is not very successful, since it varies significantly in thickness.

When making lathing from bars, it is necessary to lay boards in the areas of transverse joints to prevent sagging of the metal. The best way, of course, is to create a continuous sheathing.

With this option, you can be sure that the metal is not in danger of sagging.

In addition, the service life of the roof structure will be significantly increased, since fumes from the attic will not be able to reach the sheets of material, thereby avoiding possible corrosion of the inner surface.

Regardless of what type of sheathing is chosen, to create good waterproofing it should be covered with roofing felt or glassine.

Installation of galvanized steel sheets is carried out in various ways.

The simplest involves simply nailing sheets of material to the sheathing using nails. When choosing this technology, the job can be completed in a very short time, but the roof is short-lived.

Therefore, in most cases, another method is used, in which steel sheets are joined with folded seams, thereby avoiding the formation of holes from nails at the fastening points.

Two types of seams are created: standing and lying. Seams can also be single or double - the specific type depends on the design. Double seams are quite complex, but when used, they provide a fairly strong connection.

The sheets are secured to the sheathing using steel strips with a width of 30 to 50 mm and a length of 150 mm.

Advantages of roofing material

• If you follow some rules, working with this material is quite easy. This is quite a profitable option in terms of price-quality ratio.
• Steel sheets can be easily bent, cut and drilled.
• Galvanized material does not deteriorate when exposed to ultraviolet radiation.
• Steel roofing easily withstands temperature fluctuations and any type of precipitation.
• The material is light.
• The sheets are resistant to mechanical stress.
• They can cover roofs of any configuration.
• The installation process is quite simple.

Why are galvanized sheets used less often?

• Roofing based on zinc-coated steel sheets has been losing its position in private construction in recent years, since its installation requires certain skills and very careful handling of the material.
• If the metal is handled carelessly, the integrity of the thin zinc coating (only 0.02 mm) may be damaged, resulting in the process of premature corrosion, leading to a reduction in the service life of the created coating.
• Metal roofing made from galvanized sheets has another drawback: they must be periodically cleaned and coated with a layer of paint.
• Currently, steel roofs are installed on buildings for industrial and utility purposes, since they do not have an original design and are unlikely to decorate the building.

Quality control

To evaluate the quality characteristics of a zinc-coated sheet, just look at it. The surface must be flat, smooth, without cracks.

In sheets of cold stamping and general purpose, roughness, spots, and sagging are allowed. In other types of galvanized metal, there should be no defects.

Thus, we found out that galvanized sheet steel has almost the same characteristics as stainless steel, but at the same time its price on the market is much lower.

The main cost consists of the price of rolled metal, the cost of zinc and the cost of a specific coating method. For example, a sheet coated by galvanizing will cost more than by hot-dip galvanizing. Also, the price depends on the thickness of the sheet, zinc coating and its quality. In any case, if the sheet is suspiciously cheap, it means the manufacturer has saved on the quality or thickness of the zinc layer.

Characteristics of steel sheets

The production of galvanized steel sheets is carried out on continuous rolling mills.

• The length of the sheets varies in the range of 710-3000 mm.
• The width can be from 510 to 1250 mm.
• Thickness – from 0.5 to 0.8 mm.

Galvanized roofing steel owes its name to the zinc anti-corrosion coating applied to the sheets. For reliable protection against corrosion, the layer thickness must be at least 0.02 mm.

When applying zinc, two methods are used:

1. Hot , in which sheets of steel are lowered into a container of molten zinc.
2. Electrolytic : the sheet is immersed in a special electrolytic bath filled with a zinc solution. An electric current is passed through the solution, causing zinc particles to disintegrate and settle on the surface of the steel sheets.

The quality of the zinc coating obtained by the hot method is significantly superior to that applied by the electrolytic method.

Source: https://instanko.ru/osnastka/ocinkovka-eto.html

Galvanized steel sheets: main applications, advantages and types

Galvanized steel sheets are renowned for their excellent corrosion resistance. It has acquired a wide range of applications due to a lot of positive performance characteristics. The material is easy to process in different ways, which makes it in demand in construction, industry, and the national economy. Uniform zinc coating significantly increases the service life of the sheets without significantly affecting the weight.

Galvanized steel is supplied from production in rolls

Main advantages of galvanized steel sheets

Galvanized rolled metal has increased resistance to the negative effects of moisture. Subject to strict compliance with the technology for applying an iron-zinc or zinc alloy, its diffusion is guaranteed. Molecules of substances penetrate each other, forming an inextricable bond. This allows you to avoid violating the integrity of the protective layer during cutting, chopping and other types of sheet processing. The undeniable advantages of steel sheets include:

• a wide range of product thicknesses and protective layers;
• ability to withstand exposure to aggressive environments without change;
• high resistance to mechanical loads;
• relatively low production cost;
• long service life without loss of original characteristics.

Types and applications of galvanized sheet

In construction, galvanized sheets are used as roofing and wall coverings. The material is in demand in the chemical and food industries, where various containers, furniture, appliances and equipment, and accessories are created from it.

In architecture, galvanized steel is indispensable in the construction of ventilation shafts.

It is used for the manufacture of water pipes, corrugated sheets, cable trays, housings for measuring, switching devices and other devices, pins, fasteners and brackets, and seam roofing.

Galvanized steel is used as roofing material

Galvanized sheet lends itself to various processing methods. It can be painted, rolled, stamped, profiled. None of the above methods damage the quality and reliability of the protective coating. Steel can be easily cut into the necessary parts using available tools.

Cost and selection criteria

The cost of galvanized sheet steel depends on several factors. These include:

• sheet size and thickness;
• density of protective coating;
• grade of steel used in production.

During the galvanizing process, a layer of film is formed on the metal surface. During operation, it gradually wears out. The thicker the protective ball, the longer the service life of the material. There are three classes of sheets of this type - increased, first and second. The thickness of the coating is 40-60, 18-40 or 10-18 microns, respectively. A crystallization pattern may form on the steel surface during galvanizing. It gives the material increased decorativeness.

Table of sizes and weights of galvanized sheet

The choice of sheet depends on the area and conditions of its use. It is necessary to take into account the GOST requirements for a specific object, which will help determine the thickness and other parameters. In the process of purchasing material, it is necessary to evaluate its quality.

There may be minor defects: light and dark spots, sagging, drips, abrasions, roughness, cavities and scratches. The listed aspects do not affect the strength characteristics.

Typically, sheets with similar defects are purchased for painting.

You should not buy material that contains chips on the surfaces or has uneven thickness. Such deviations indicate a violation of production technology.

Source: https://HeatTreatment.ru/listovaya-otsinkovannaya-stal-osnovnie-sferi-primeneniya-preimuschestva-i-vidi.html

Products – Tekhmashholding – group of companies, official website

The most resistant, lightweight and economical material with high anti-corrosion characteristics is considered to be galvanized sheet or galvanized sheet steel. This material is widely used for the manufacture of roofing elements, ventilation ducts, as well as drainpipes, etc. Galvanized sheet is a type of rolled metal, a steel sheet coated with a thick layer of zinc to protect against corrosion.

How exactly is galvanized steel produced?

To obtain a galvanized sheet in production, a steel sheet is coated with special grade zinc. This coating can be applied on both sides or on one side of the sheet. The thickness of the coating may vary depending on the further area of ​​application of the galvanized sheet, as well as on the expected degree of humidity in the environment of its use. Galvanizing production takes place on specialized hot-dip galvanizing units. This is the most common method of making galvanized sheet. There are also two more options for the production of this type of rolled metal - the galvanic method and cold galvanizing, but they are used quite rarely. Sheet galvanizing is carried out in several stages. The first stage consists of firing the steel sheet. Next, proceed to the second stage - after firing, the sheet is placed in a bath of molten zinc. This is the processing process that a steel sheet goes through in order to obtain high corrosion resistance characteristics. To better protect the surface of the sheet, it is preserved: passivation, oiling, or oiling and passivation. Quite often these procedures are used simultaneously.

Properties of galvanized steel sheet

The main properties of galvanized sheet include the fact that the material can be easily processed by rolling, stamping, drawing and bending. And also, it should be noted that the steel sheet after galvanization has all the characteristics of “stainless steel”. The galvanized steel sheet must meet all the technical characteristics specified in GOST 14918-80. The standard also applies to coiled and cold-rolled sheet steel, coated with zinc in continuous hot-dip galvanizing units, intended for painting, for the production of stamped parts, containers, utensils and other iron products. According to the standard, the dimensions of galvanized steel can vary as follows: width from 71 cm to 150 cm, and thickness from 0.4 mm to 1.5 mm. For the manufacture of galvanized sheets, steel of various grades is used, there are quite a lot of them, but the main ones, the most commonly used:

• 100, St1, StZ and St2 of all degrees of deoxidation according to GOST 380-94;
• 08ps and 08kp or 08Yu according to GOST 9045-93;
• 08ps and 08kp or Yukp according to GOST 1050-88.

Classification of galvanized sheet

Galvanized steel sheet can be classified according to many parameters, on which its scope of application subsequently depends.

One of the main classifications is the classification by purpose, as a result of which the galvanized sheet is marked and can be used for:

• HP - cold profiling;
• PC - coloring;
• ХШ - cold stamping;
• OH - general purpose.

There are also categories of galvanized sheets according to such an equally important indicator, related only to the XIII group, as the ability to draw:

• N - normal;
• G - deep;
• VG - very deep.

When classifying galvanization, you should also know that the sheet can be of two types, depending on the quality of the application of zinc to the steel surface:

• NR - normal thickness variation;
• UR - reduced thickness variation.

Galvanized steel can also be manufactured with a crystallization pattern (CR) and without a crystallization pattern (MT) on the surface of the sheet; this point is also specified when ordering individual production.

Division of galvanized sheet into classes, depending on the coating thickness:

Class Weight of 1 meter of coating layer applied on both sides, in grams Thickness of galvanized sheet coating, microns

P - upgraded class	855 — 570	60 — 40
B - high class	570 — 258	40 — 18
O - regular class	258 — 142,5	18 — 10

When choosing the right galvanized sheet, you should take into account all the environmental conditions and areas of its application in order to choose the right type and class of galvanized steel.

Application areas of galvanized steel material

Galvanization is used quite extensively in various areas of construction and production.

Such a sheet has three main characteristics that are important during its operation: durability, high strength and ease of installation and dismantling. When it comes to finishing work, galvanized sheet is indispensable. Domestic, construction and industrial facilities are created on its basis. This could be, for example, a drainage system, equipment for transporting liquids, automobile bodies and finishing metal profiles.

Based on galvanized sheets, an endless variety of industrial, construction and household products are made. One well-known product is metal tiles, which are so popular in roofing work.

Also in practice, galvanized sheets are used literally everywhere; its elements are present in many structures around us, for example, ships, train stations and airports, billboards, cars, stairs, cornices, fences and other metal structures.

The main thing is to choose the right material of the right size and purpose, and it is best to get professional advice from our managers.

Buy galvanized steel sheet - price list

The MINPROM GROUP company offers rental of galvanized sheets at reasonable prices, which can be found in the price list.

Look at the price in the price list for galvanized sheets in Dnieper and Kyiv.

Our managers will help you choose the right size and type of galvanized sheet, and will also inform you about the discounts currently in effect in our company for the required galvanized sheet - call.

minprom.biz

Galvanized sheet - application |

Galvanized sheets are widely used in construction, the automotive industry, and even in modern interior design. It is used everywhere where high corrosion resistance must be maintained. Where to buy galvanized sheet metal? Why use it and what to look for when choosing? We will provide a comprehensive answer to these questions!  

What is galvanized sheet metal used for?

Galvanized sheets are metallurgical products. They are made by hot-dip galvanizing, the steel sheet is coated with a layer of zinc. This coating is very dense and covers the entire surface.

Steel sheets that have been galvanized acquire anti-corrosion properties. Due to its high moisture resistance, galvanized sheets can be successfully used outdoors; they are not afraid of the aggressive effects of various atmospheric factors.

It does not rust when exposed to rain and snow, and is also resistant to high temperatures.

Galvanized sheets are associated in the public consciousness with iron garages located in close proximity to old settlements, such that they do not have a very neat appearance. Meanwhile, through different technologies, different invoice and appearance of galvanized steel can be achieved.

Thanks to this, not only the garage, but every element covered with tin acquires an attractive appearance. Steel sheets should not be unsightly; this is evidenced by at least using them in interior architecture.

You can purchase high-quality galvanized sheets for your needs on the website of the Stroy Metal company t: (066) 288 34 66.

In what cases is galvanized sheet used? Depending on the type of steel, galvanized sheets are used for roofing materials, not only for covering outbuildings, but also for residential ones. They are used for the manufacture of drainpipes, as well as the manufacture of the aforementioned garages, service and utility rooms. In particular, galvanized corrugated sheets are excellent for covering the roofs of residential buildings.

Nowadays, a lot of competition has led to manufacturers competing to produce metal sheets in different colors. Corrugated sheets are also used to cover the roofs of factories and warehouses. You can also see it in the centers of large cities. Galvanized steel sheets are also used to create doors, insulation, ventilation ducts, as well as for the manufacture of household items.

As you can see, galvanized sheet metal is used not only in construction, but also in the production of everyday items and in architecture. It's hard not to mention the automotive industry.

Galvanized elements are currently found in every car (especially in the body). You can find galvanized sheets every day on Ukrainian roads.

It is precisely because modern car bodies are made of galvanized sheet metal that the risk of corrosion is very small.

Galvanized sheets, due to their excellent parameters, are widely used. The material is in demand by both individual clients and large enterprises. Fortunately, a wide selection of manufacturers allows you to find a product that suits your needs without any problems.

Galvanized sheet, price and types

Posted by admin | Date September 8, 2017

Galvanizing metal is one of the best methods of anti-corrosion treatment. Zinc is not susceptible to rust, so metal sheets coated with a zinc layer are in great demand in many industrial sectors and the construction industry. Galvanized sheets, the price of which depends on many factors, are produced and sold by many companies. Selecting quality products should take into account several criteria.

Application of galvanized sheets

Zinc coated metal sheets are produced in two ways. Hot-dip galvanizing technology involves placing the sheet in liquid zinc brought to high temperatures. The finished product acquires a protective layer of 80 to 250 micrometers.

More flexible products are obtained by galvanization. This is coating using electric current. The thickness of the zinc layer thus does not exceed 12 micrometers. Regardless of the production technology, galvanized sheets have the following advantages:

• corrosion resistance;
• strength;
• durability;
• plastic;
• small mass.

All these qualities determine the popularity of using products in construction. Galvanized sheet, the price (more details) of which is quite affordable compared to other building materials, is used for the construction of roofs, fences, floors, etc. In addition, the material is used to create automobile bodies, equipment bodies, large tanks, etc.

Galvanized sheets, which are given a wave, are called corrugated. This material is widely used for the construction of roofs on large industrial and residential buildings. Arched hangars, warehouses and other buildings for agriculture are built from it.

Pricing for galvanized sheets

High-quality galvanized metal sheets cannot be overly cheap, since good steel itself cannot be cheap. Rolled steel is the starting material for the production of these sheets. Both the price and technical characteristics of the finished product directly depend on its quality.

In addition to the cost of raw materials, the final cost of galvanized sheets depends on:

• leaf area;
• sheet thickness;
• zinc used;
• galvanizing method.

Obviously, the larger the area of ​​the product, the more expensive its galvanizing will be. The thinner the sheet, the cheaper it is. As for production technology, the hot method is cheaper than galvanization. Therefore, in the price list of different companies for galvanized sheets, prices (find out) can vary greatly.

Source: https://pellete.ru/cink/list-ocinkovannyj-eto.html

Galvanized steel with polymer coating: features of the material and main characteristics, scope of application - Machine

18.12.2019

Corrugated sheeting, metal tiles, metal siding are popular building materials used for exterior finishing of buildings and fences. One of the main semi-finished products used in their production is thin rolled steel sheets. To ensure the corrosion resistance of these products, galvanizing has been used for a long time.

This method of protection provided a maximum of 25 years of operational life under normal operating conditions. Modern technologies for applying durable and beautiful polymer coatings have made it possible not only to increase this figure by two times or more, but also to create aesthetically attractive materials.

A wide range of products makes it possible to choose the best option for any building style and landscape design and for any climatic conditions.

Structure and production of polymer coated steel sheet

A protective layer of polymer materials is usually applied to rolled steel. It is problematic to evenly distribute the substance on finished profiled products. Only expensive equipment can solve this problem, which has a very negative impact on the cost of production.

Attention! For the manufacture of profiled products, high-tech automated lines are used, since the protective coating is quite thin and can be easily damaged when using primitive machines.

• The basic protection against corrosion processes in these products is the zinc layer.
• At the passivation stage, zinc is covered with a corrosion barrier - an oxide film.
• Primer – increases the adhesion of the base layer and polymer protector.
• As a finishing coating for the front side of the sheet, a polymer is used, protected for the period of storage and transportation by self-adhesive film. A special varnish is usually applied to the inside.

There are several ways to apply a polymer layer, the most common is powder.

The essence of the process is that an electric current is passed through a product placed in a special chamber, and a fine powder with an electric charge of opposite sign is sprayed.

Under the influence of an electromagnetic field, polymer particles adhere tightly to the metal surface. The painted sheet is sent to the oven, where the outer layer is polymerized.

The use of powder coating has a number of advantages compared to the process using liquid compositions:

• The dye is distributed evenly, with minimal error. The defect rate is insignificant.
• The polymer-powder layer has high adhesion to the base surface.
• The strength of the coating ensures its resistance to mechanical damage and, therefore, a long service life.

Let's look at the most popular types of polymers used to coat galvanized steel.

Polyester coating is the cheapest and most common option.

This polymer coating is typically 25 microns thick. Its base is fade-resistant elastic polyester paint. If the intended purpose requires a decorative appearance of the product on both sides, for example, installation of fences, a sheet with a double-sided polymer coating is used.

Steel sheets with a zinc-polyester complex layer have a multi-purpose area of ​​application, a wide range of colors, a long service life (in the absence of mechanical damage), and are resistant to sudden temperature changes.

The main disadvantage of such products is the small thickness of the outer protective layer, which makes it vulnerable to even minor mechanical stress.

Corrugated sheets made from such sheets are not recommended for use for fencing located near busy highways.

Attention! It is prohibited to use a grinder to cut such products, since this tool can easily burn through the thin outer layer.

In addition to the glossy surface, the polyester coating can be produced in a matte version. These two layers are identical in composition, but different in characteristics.

Advantages of matte polyester:

• Forms a slightly rough surface capable of scattering sunlight, which is gentle on vision.
• It is applied in a thicker layer - approximately 40 microns, which provides a longer service life.
• An aesthetic plus - using modified textured polyester, a reliable imitation of stone, wood, and brick is obtained.

Pural - reliable, strong, durable

Pural coating is made on the basis of polyurethane; the composition may contain polyamide and acrylic. The thickness of this durable protective layer is 50 microns, so it is very difficult to damage. Advantages of zinc-polyurethane coating:

• It is resistant to a certain number of chemically active substances, which allows the use of such products in areas with high levels of industrial pollution. Can be used in the construction of facilities in regions with a maritime climate.
• Fairly high resistance to ultraviolet rays, but over time the color brightness decreases.
• Withstands significant temperature changes, therefore it is used in harsh climatic conditions.
• The working period of such a tread layer is approximately half a century.

The disadvantage of pural coating is its high cost, several times higher than the cost of products with polyester protection. Most often used for roofing and finishing facades of luxury buildings. It is practically not used for constructing fences and utility rooms.

Attention! The matte pural coating has a special structure that provides additional protection against dirt.

Main characteristics of zinc plastisol coating

Plastisol is a polymer composition containing polyvinyl chloride and plasticizers. This protective layer is thick - 200 microns, and is therefore resistant to mechanical damage. The presence of PVC provides protection from the effects of chemically aggressive substances. The plastisol layer can be embossed to look like leather, stone, or wood, resulting in a matte surface that does not give glare.

Disadvantages of coverage:

• Low temperature resistance, which does not allow the use of products in regions with hot climates.
• It fades quite quickly, so it is recommended to give preference only to light shades. Such products not only look better for a long time, but also heat up less.

Areas of use:

• in northern regions with harsh climates;
• in industrial zones, the presence of chemical industry facilities is allowed;
• in places with a high risk of mechanical damage - in areas with dust storms or frequent hail.

PVDF – maximum protection against all types of non-mechanical impact

PVDF (polyvinylden fluoride) consists of 80% (70%) PVC and 20% (30%) acrylic, the advantages of this coating:

• Unique resistance to ultraviolet exposure, the color range practically does not change over time.
• High resistance to aggressive atmospheric conditions, possible use in marine climates.
• Ability to maintain performance characteristics when in contact with acidic and alkaline environments.
• High resistance to corrosion processes.
• Good resistance to mechanical damage.
• Ability to withstand temperatures up to +120°C.

Galvanized sheet with PVDF coating is used for roofs and facades of projects located near busy highways, in polluted industrial areas, in areas with a maritime climate. The service life of such coating is approximately 40 years. These products have one significant drawback - their high price.

Innovative environmentally friendly products made of galvanized steel with polymer coating

A well-known manufacturer of rolled sheet products with a zinc-polymer protective layer is the SSAB company. GreenCoat is a new brand of this company, guaranteeing not only high quality, but also environmental friendliness of products. How does the GreenCoat line differ from similar products:

• the material does not have a negative impact on the environment due to the absence of chromates;
• instead of traditional petroleum products, rapeseed oil is used in some coating modifications;
• enhanced performance characteristics through the use of innovative components.

To make it easier to select the required products, the physical, operational properties and areas of application are summarized in tables.

Table of physical characteristics of various types of polymer coatings

Characteristics	Polyester glossy	Polyester matte	Pural (polyurethane)	Plastisol	PVDF
Nominal coating thickness, microns	25	35	50	200	27
Primer thickness, microns	6	12	20	8	7
Maximum operating temperature, ° C	90	90	100	70	110
Operational period, years	20–30	30–40	40–50	30–50	30–40
Compound	Polyester	Polyester	Polyurethane, acrylic, polyamide	Polyvinyl chloride, plasticizers	Polyvinylidene fluoride – 70% (80%), acrylic – 30% (20%)

Assessment of the stability of polymer decorative and protective coatings on a five-point scale

Aggressive factor	Polyester glossy	Polyester matte	Pural (polyurethane)	Plastisol	PVDF
UV radiation	3	3	4	1	5
Mechanical impact	2	3	4	5	3
Chemical exposure	2	3	4	4	5
Extreme climate conditions	2	3	4	4	5
Corrosion	3	4	5	5	4

Selecting the optimal coating depending on environmental conditions

Environmental conditions	Roof	Facade
Middle strip, clean non-industrial area, surface does not require frequent maintenance	Polyester – glossy and matte, pural and plastisol	Polyester – glossy and matte, pural and plastisol
The area is located near busy highways, the surface requires care - washing, cleaning	Polyester, pural and plastisol	Pural and plastisol
Industrial area with polluted air	Pural, plastisol, PVDF	Pural, plastisol, PVDF
Southern regions with active ultraviolet radiation	Pural, PVDF	Pural, PVDF
Area with a maritime climate	Plastisol (if the climate is not too hot), pural, PVDF	Plastisol, pural, PVDF
Regions with cold climates	Plastisol, pural, PVDF	Plastisol, pural, PVDF

Rules for purchasing products made of galvanized steel with polymer coating

Before purchasing products, make sure the quality of this material:

• The surface of the product must be smooth, the coloring must be uniform, there should be no smudges, and the edges must not have burrs.
• Products must be accompanied by a quality certificate.
• Please note the warranty period. If it is not indicated or is too small, it is better to refuse such a purchase.
• When test bending the products, the coating should not become cracked.
• It is recommended to purchase goods either directly from the manufacturer’s warehouse or through an official dealer.

Source: https://regionvtormet.ru/okrashivanie/stal-otsinkovannaya-s-polimernym-pokrytiem-osobennosti-materiala-i-osnovnye-harakteristiki-oblast-primeneniya.html

Galvanized steel sheet - classification and application | Minprom Group Metal Rolling

Galvanized steel sheet is a type of rolled metal, a steel sheet coated with a thick layer of zinc to protect against corrosion.

The most resistant, lightweight and economical material with high anti-corrosion characteristics is considered to be galvanized steel sheet or galvanized sheet steel . This material is widely used for the manufacture of roofing elements, ventilation ducts, as well as drainpipes, etc.

Buy galvanized steel sheet - price list

The MINPROM GROUP company offers rental of galvanized sheets at reasonable prices, which can be found in the price list.

Look at the price in the price list for galvanized steel sheets in Dnepr and Kyiv.

Our managers will help you choose the right size and type of galvanized sheet, and will also inform you about the discounts currently in effect in our company for the required galvanized sheet - call.

Source: https://minprom.biz/spravochnik/list-stalnoj-ocinkovannyj-klassifikacija-i-primenenie/

Galvanized sheet is an important building material for solving most problems.

Everyone is familiar with the look of galvanized sheet metal. Products of this type combine a number of characteristics, including increased anti-corrosion properties and a loyal pricing policy, which make them more popular for any type of repair and construction work. We will talk about this product below in the article, we will talk about the production technology of galvanized sheets, their areas of application and installation features.

Galvanized sheet manufacturing technology

Galvanized metal sheets are designed for cold forming, stamping products, painting products and so on. Galvanization is carried out at many enterprises and metallurgical plants not only in our country, but also in neighboring countries. GOST 14918-80 specifies the technical characteristics (standards) that sheet or coil cold-rolled steel galvanized in galvanizing units must comply with.

The production of galvanizing begins with ordinary iron, most often steel grade St08ps is used. The ps value in the marking indicates semi-boiling steel of higher quality than the same semi-boiling and boiling grades. At many metallurgical plants, rolled products are often made from the following grades of metal: St1 (2 and 3) of any degree of deoxidation (according to DSTU2651-94; State Standard 380-94); 08ps, 08kp, 08Yu (according to GOST 9045-93); 08ps, 08kp, Yukp (according to GOST 1050-88).

The manufacturing process begins with the removal of scale from a hot-rolled strip of metal using acid etching. Then, without preheating, the workpiece is rolled with special devices, achieving a certain strip thickness.

In order for the strips to obtain the necessary properties, the product can be annealed. Next comes the main process of galvanic (electrolytic) galvanizing of the metal plate in a special continuous hot-dip galvanizing unit.

For the covering layer, zinc grades Ts1 and TsO are used, less often Ts2 (GOST 3640-79), adding lead, aluminum, and many other alloys to the bath. The thickness of the zinc layer is very small and amounts to 0.01 mm and up to 0.06 mm. The zinc thickness indicator depends on the concentration of its mass in the bath, the time the product is in the galvanizing bath, on the electrical parameters of the process itself and other factors.

Depending on the thickness of the coating, the treated metal can be divided into classes:

1. P (advanced class) - 855-570 grams (thickness in microns - 60-40 microns) - this is an indicator of the mass of the layer applied on both sides of the plate per square meter;
2. Class 1 – 570-258 grams of double-sided application and is 40-18 microns;
3. Class 2 – 258-142.5 grams – 18-10 microns.

To protect the galvanized surface from damage to the metal by corrosion, it is preserved: oiling, passivation, or oiling with passivation.

The range of galvanized products comes in standard sizes:

• width ranges from 700-1800 mm or more;
• rolling thickness – 0.3-4.5 mm;
• the length of the sheet profile is 2000-2500 mm; or whole rolls are supplied.

Retail chains provide mainly products in the following sizes: 125/250 cm and 100/200 cm, thickness 0.5-1.9 mm. The average cost of a ton of the material in question is about 31,200 rubles, regardless of cutting.

Among other things, thin-sheet galvanized steel (OTs - galvanized sheet), produced by plants for further profiling, is divided according to purpose, for example:

• HP marking implies cold profiling;
• ХШ – cold stamping process;
• PC – coloring;
• It is indicated if the material is specialized for a general purpose.

You can also divide raw materials into categories according to their extraction capabilities (the definition refers to group XIII):

• N – normal;
• G – deep;
• VG – very deep.

And also in terms of the uniformity of the thickness of the zinc layer:

• with normal thickness variation, HP is indicated;
• with reduced thickness variation - UR.

There may be a special agreement between raw material manufacturing plants and enterprises that purchase it for further rolling that regulates the state of the OC, that is, the strip can be manufactured marked KR (with a crystallization pattern) or MT (without a crystallization pattern).

Both the marking of galvanized raw materials and packaging and transportation, including storage of panels, are carried out in accordance with GOST 75668. Finished products can be divided into corrugated, corrugated, painted or smooth stripes.

The plates, in turn, can be treated with zinc, both on both surface sides, and on one. Cutting of rolled products is carried out mechanically using a guillotine or thermally (laser).

The cut material can have cut edges or uncut edges.

We list some requirements regarding the quality of products:

• the zinc layer should be evenly distributed over the entire surface of the surface;
• on rolled products with uncut edge ends there should be no torn end parts with a depth exceeding the permissible deviations;
• Various cracks on the applied zinc layer should not be visible;
• the application must be carried out without sagging, as well as traces of them, without dark inclusions or roughness;
• In case of mechanical damage and impact on the surface, the integrity should not be compromised.

The presence of some defects and their admissibility are regulated by GOST.

Scope of application of galvanized production products

The scope of application of galvanized raw materials is quite wide, and a great variety of products are produced from it. For example, by stamping we can purchase corrugated sheeting, metal tiles, or by drawing, rolling and bending strips, we obtain drainpipes, profile pipes, additional elements for siding, for roofing, fences and parapets. In addition, steel with a layer of zinc can be processed with polyester, the base of which contains polyester paints.

The industry of use of the material in question is not limited to industrial and private construction, it can also be the automotive industry, the food industry, mechanical engineering, as well as the production of a wide range of consumer goods and household appliances. This popularity is due to its strength properties, relatively light weight, durability and, most importantly, ease of installation of galvanized steel and items made from it.

Sometimes, instead of a galvanized profile, in sectors of the national economy, steel with an aluminum-zinc applied layer is used. This layer is three-component: 55% aluminum; 1.6% - silicon; the remaining share is assigned to zinc.

The quality and some properties of such production differ mainly from galvanized profiles, this especially applies to containers for storing water resources. Such products are used for welding with less loss of raw material properties.

It is used in the production of refrigerators, washing machines, gas and electric stoves, air conditioning units, dishwashers, and in other areas.

We will tell you some features regarding the installation work of metal treated with zinc coating. With any thickness of zinc applied, during the installation process, the integrity of the surface may be damaged, which will subsequently lead to corrosion of the metal. If this happens in visible places, then it is better to treat them with substances based on high-strength paints and varnishes.

Even if the products are coated with a durable industrial base, you still should not treat, for example, metal tiles carelessly, since a small scratch can expose the metal to corrosion.

Often on the surface of the product, after just a couple of months of use, there is a phenomenon such as oval whitish spots, reminiscent of moldy lesions. According to the law, such goods can be returned or exchanged, of course, provided that you keep the purchase receipt. The reason for this phenomenon lies in the uneven application of zinc to the steel. Also, when the plane of the steel strip is insufficiently etched, even at the stage of rolled product production.

When working with a galvanized product for the purpose of manufacturing all kinds of profiles and products, it is better to use the help of a roofer than a welder. The reason for this is based on the fact that welding steel containing zinc will allow the processing points to suffer corrosion due to the fact that the zinc simply burns off in such places.

Cutting of molded raw materials is done using roofing scissors; new scissors with curved edges are often used. This applies to the case of individual construction, but for productivity it is permissible to use a grinder with a disk for cutting metal, a jigsaw with metal files, or electric vibrating shears.

Source: http://srubnbrus.com/2170.html

Advantages of galvanized sheet

Steel sheet is a convenient and popular material in many areas, but unfortunately, it is susceptible to corrosion. Galvanization increases the resistance of the metal to aggressive environments, including rusting processes. Thus, galvanized sheets are successfully used in construction, the automotive industry, in the production of all kinds of products and in other areas.

Production

Galvanizing is a technological process during which a layer of zinc is applied to the surface of a steel sheet. The thickness of the coating may vary depending on the purpose of the sheet, but cannot be less than 0.02 mm.

Galvanizing can be carried out by galvanic method, cold galvanizing, but hot galvanizing is most often used.

Hot galvanizing takes place in stages. First, the surface is degreased, followed by etching and washing. Finally, the steel sheet is immersed in a bath of molten zinc. At the same time, the speed of the process, the quality and temperature of the zinc are controlled by special devices. The result is a smooth metal surface with high characteristics that tolerates mechanical processing without losing its properties.

Properties

Technical characteristics of galvanized steel coated by hot-dip galvanizing are regulated by GOST 14918-80. According to the standard, the sheet width should be from 71 cm to 180 cm, and the thickness from 0.5 mm to 2.5 mm. For the production of galvanized sheets, cold-rolled steel of various grades is used.

Galvanized steel has many advantages:

1. Corrosion resistance.
   The main property can safely be considered the presence of a stable protective coating, and as a result, high corrosion resistance
2. Possibility of processing.
   A sheet coated with zinc can be processed by rolling, stamping, drawing and bending without fear of damaging the zinc layer.
3. Life time.
   The durability of products is higher compared to ferrous metal. This sheet is resistant to high humidity and aggressive environments and does not require treatment with paints and varnishes.
4. High mechanical strength.
   The zinc layer is firmly bonded to the steel base and, as a result, is not damaged by bending or chipped off by impacts. Zinc improves the sheet's resistance to mechanical loads and abrasive wear.
5. Significant assortment. Galvanized sheets have a wide range of blade sizes and zinc layer thicknesses.

Zinc coating is environmentally friendly compared to other protective coatings applied to steel sheets.

In addition to these main points, it is worth noting the ability of the coating to self-heal in the event of scratches and cavities. And the matte finish of zinc sheet attracts many designers.

Galvanized steel has minor disadvantages, which are still worth considering when choosing a sheet. So the exposed part will lose a small thickness of the zinc layer over time. Such metal is difficult to weld, and when painting, you will have to additionally prepare the surface of the sheet.

Classification

Galvanized steel sheet has several classifications, on which the further scope of application depends.

• Depending on the purpose, galvanized steel is distinguished: KhP - cold profiling; PC - for painting; ХШ - cold stamping; OH - general purpose.
• Sheets used for cold stamping are divided into groups according to their ability to draw: N - normal; G - deep; VG - very deep.
• Depending on the thickness of the zinc coating, the sheets are divided into: HP - normal; UR - reduced.
• Depending on the thickness of the coating, the sheets are divided into: P - increased class (60 - 40 microns); B - high class (40 - 18 microns); O - normal class (18 - 10 microns).

A galvanized sheet can have a crystallization pattern (CR) or without a pattern (MT) on the surface of the sheet. The sheet is also classified according to rolling accuracy: increased (A), normal (B) and high (C).

When choosing a galvanized sheet, you should take into account the scope of its application and the environmental conditions in which it will be used.

Application

In practical life, galvanized sheets are used everywhere. Elements from it can be found in various structures around us, on ships, train stations, billboards, cars, fences and other metal structures.

Since the sheet is resistant to corrosion, it has found wide application in modern industry. Such rolled products are used in various areas of production: in the heavy, chemical industries, and in instrument making.

Due to the fact that the sheet can be machined, stamped parts and deep-drawn and profiled products are produced from it.

Galvanized sheets are in demand in the mechanical and automotive industries. For example, for the production of a van body or trim. But still, the main area of ​​application for zinc-coated sheets is construction, because it is a durable and high-quality material.

It is applicable for construction and installation work, for the construction of metal structures. The structures are quite light, with little load on the walls and ceilings. It can be used to construct a hangar, garage, storage room, etc.

Galvanized sheets are used to line roofs, install ceilings, or use them as a material for walls and flooring.

The sheet is used for exterior finishing of walls, roofs, fences, balconies. It is excellent for cladding buildings. Zinc coated sheet is the basis for the manufacture of a wide range of construction products:

•     corrugated sheeting (galvanized or with the addition of polymers to impart protective and decorative properties);
•     metal tiles (which are in demand in roofing work);
•     picket fence;
•     construction profile;
•     strip.

Galvanized sheets are used to produce water pipes, air ducts and drains, brackets and all kinds of fasteners, as well as household items. Ventilation systems and kitchen hoods are made from it.

Galvanized sheet: technical characteristics and scope of application

Galvanized sheet is a metal product for the production of which cold-rolled (less commonly, pickled hot-rolled) coiled or sheet steel is used. A protective zinc layer is applied to the steel base. Galvanizing provides not only barrier (similar to paint and varnish materials), but also electrochemical protection of rolled steel from corrosion. The protective layer, depending on the chemical composition and method of application, may have different thickness, appearance, and performance characteristics.

Types and main characteristics of coatings

GOST R 52246-2016 under the concept of “galvanized rolled products” combines products with the following types of coating:

• Zinc (Z) . Galvanizing is carried out in several ways - hot, galvanic, thermal diffusion. For local processing of individual areas, cold galvanizing is used. In the mass production of galvanized sheets, the most commonly used method is hot-dip galvanizing, carried out in baths of molten zinc. A high-performance process is the processing of rolled products on continuous lines.
• Iron-zinc (ZZ) . This coating is obtained by annealing rolled steel with a coating that contains up to 12% Fe. The surface is gray, matte, there is no crystallization pattern. Variety – iron-zinc tempered (ZZD). This coating is obtained by cold deformation of rolled products with an iron-zinc layer in a temper mill. It is usually used as a basis for subsequent decorative processing. The surface has a specified roughness value.
• Zinc aluminum (CA) . Resistant to corrosion and high temperatures. This coating combines the ductility of aluminum and the corrosion resistance of zinc.
• Zinc-aluminum-magnesium (ZAM) . The composition of the melt into which the steel sheet is immersed, in addition to zinc and aluminum, includes magnesium.

The corrosion resistance of zinc coating increases with increasing thickness, but the risk of zinc peeling during stamping or bending increases. The thickness of the protective layer is characterized by its class. High classes are used for products that will not be coated with a coloring layer.

Table of coating classes according to GOST R 52246-2016

Class	Coating weight on both sides, average for three samples, not less, g/m2	Coating thickness on one side, average for three samples, not less, microns	Coverage class	Coating weight on both sides, average for three samples, not less, g/m2
Zinc and iron-zinc	Zinc-aluminum
60	60	4,2	60	60
80	80	5,6	80	80
100	100	7,0	95	95
120	120	8,4	130	130
140	140	9,8	185	185
180	180	12,6	200	200
200	200	14,0	255	255
225	225	15,8	300	300
275	275	19,3
350	350	24,5
450	450	31,6
600	600	42,0

Technical characteristics of galvanized sheet

Zinc coatings for steel sheets make up approximately 60% of all metal protective layers used in the national economy. Not only sheet metal is galvanized, but also pipes, shaped steel, fasteners, wire, parts of machine tools, automated lines, machines and mechanisms. This method has gained wide popularity among metal product manufacturers due to the complex of positive properties of the protective layer, including:

• Elasticity . Galvanized sheets and rolls are capable of drawing, rolling, and bending.
• Freshly deposited zinc coating can be easily soldered using acid-free fluxes.
• Zinc is an active metal that has a more negative electrical potential compared to iron, therefore it is zinc that reacts with aggressive solutions, protecting the steel base from destruction . In conditions of high humidity, zinc reacts with carbon dioxide and sulfur compounds in the air to form a thin film of zinc hydroxides and carbonates.

At temperatures above 0°C, zinc in relation to iron changes the type of protection from anodic to cathodic, which leads to the preservation of the zinc layer and rapid corrosion of the steel base. Therefore, galvanized sheets are not used for operation at temperatures above 0°C.

The protective properties of zinc also sharply decrease in the atmosphere with organic compounds - chlorine-containing hydrocarbons, vapors of synthetic resins and other substances. The destruction of the coating is caused by the proximity of galvanized rolled steel to freshly painted or oil-treated products and structures.

To increase the resistance of the zinc layer to such atmospheres, it is treated with solutions of chromic acid or its salts, as well as salts of phosphoric acid.

The colors of the zinc coating range from gray to light gray. Over time, the surface darkens and becomes dull. The phosphated coating has colors ranging from dark to light gray; the crystalline structure of the phosphate film is visible on the surface.

The corrosion resistance and aesthetics of sheets and other types of rolled products can be improved by chromating. In this case, the surface acquires colors from golden yellow to yellow-green. The brownish color in this case is a sign of marriage.

Range of galvanized sheets

In accordance with GOST R 52246-2016, products are produced in the following sizes:

• sheet width – 0.7-1.8 m;
• roll width – 0.5-1.8 m;
• the thickness of the base with the thickness of the protective layer is 0.3-4.5 mm.

Areas of application of galvanized steel

In GOST R 52264-2016, galvanized sheets are divided into grades according to their intended purpose:

• 01 – flat and curved products;
• 02 – tableware products obtained by bending and joining into a lock;
• 03 – deep-drawn stamped parts and profiles of complex configuration;
• 04, 05, 06 - products made accordingly by complex, particularly complex, very particularly complex drawing;
• 07 – products in the production of which particularly deep drawing was used;
• 220, 250, 280, 320, 350, 390, 420, 450 – profiled sheets in demand in construction.

The most common area of ​​application of galvanized sheets is the production of corrugated sheets, metal products used, depending on the brand, as roofing material, for the construction of fences, wall cladding, and in the manufacture of multilayer (“sandwich”) panels. Flat sheets are in demand for the manufacture of additional elements of roof structures - ridges, abutments, gutters and pipes, and finishing of gables.

Source: https://www.navigator-beton.ru/articles/list-otsinkovannyj-harakteristiki.html

Galvanized sheet manufacturing, characteristics and marking

articles:

Galvanized sheet is a type of rolled steel, which is one of the most popular in various fields. Due to its ability to resist corrosion, this rolled sheet is successfully used in construction, manufacturing, mechanical engineering, etc.

Manufacturing of galvanized steel sheet

The blank for such a metal product is an ordinary steel sheet, the surface of which is coated with a thin layer of zinc (from 0.02 mm). The galvanizing process is carried out in one of three ways:

• cold;
• hot;
• galvanic.

Most often, manufacturers resort to the hot-dip galvanizing method, since it allows obtaining the highest quality indicators for rolled sheets. Galvanization takes place in several stages:

1. Degreasing the surface.
2. Sheet etching followed by washing.
3. Immersion of the workpiece in a bath of molten zinc.

Throughout the entire process, it is necessary to strictly check the temperature conditions of the environment in which the zinc is located. Preliminary quality control of this metal is also necessary to achieve optimal results.

Characteristics of galvanized sheet

Galvanized sheet metal must meet the technical requirements set forth by state standards. The main requirements for this metal product are compliance with the regulated dimensions. So, the width of the sheet should be 71-180 cm, thickness - 0.5-1.25 mm. The blank for galvanizing is a cold-rolled steel sheet. What distinguishes zinc-treated steel from other materials is its durability.

Advantages of zinc coated steel sheet:

• resistance to corrosion;
• long service life;
• high strength (resistance to mechanical damage);
• possibility of processing by stamping, rolling, drawing and bending without damaging the galvanization;
• aesthetic appearance;
• self-healing ability of the coating;
• environmental friendliness;
• a large assortment.

The disadvantages of this material include thinning of the zinc layer over time, difficulty in welding, and the need for additional cleaning before painting.

Marking of galvanized steel sheets

Galvanized sheet metal is classified depending on:

• assignments to sheets:
• general purpose (indicated by OH marking);
• cold stamping (ХШ);
• cold profiling (CP);
• for painting (PC).
• changes in the thickness of the galvanized layer on sheets:
• normal thickness variation of galvanized steel (grade NR);
• reduced thickness variation of galvanizing (grade UR).
• thickness of zinc coating on sheets:
• regular class - thickness 10-18 microns (grade O);
• high class - thickness 18-40 microns (grade B);
• higher class - thickness 40-60 microns (grade P).
• sheet rolling accuracy:
• increased accuracy (denoted A);
• normal accuracy (B).

The marking of rolled sheets begins with an indication of its type - galvanized steel sheet is designated Ots. Next, the rolling accuracy, coating class, purpose, and the presence of a cut edge (denoted O) are indicated. The numbers indicated on the markings are thickness, width and length in mm. After the numerical designation, GOST is indicated, which sets product standards.

Areas of application of galvanized sheet

Galvanized sheet, as mentioned above, is widely used in various fields due to its anti-corrosion properties. It is used in:

• instrument making;
• chemical industry;
• mechanical engineering;
• heavy industry;
• construction industry and many others.

Galvanized sheet metal is in greatest demand in construction and installation work. Its use guarantees the structure's lightness, resistance to negative weather conditions, and durability. In addition, this type of rental has a pleasant appearance and has a matte surface, which attracts many designers.

Galvanized sheets are used as an element of flooring, finishing, material for the construction of walls, flooring, cladding material, etc. Rolled sheet metal coated with zinc is used and as a blank for the subsequent production of corrugated sheets, metal tiles, profiles, strips, picket fences, etc. This sheet is also suitable for production of pipes for air and water disposal systems.

Qualitative assessment

Determining the quality of a galvanized sheet is quite simple - you just need to evaluate its external data. There should be no chips or cracks on its surface, it should be smooth.

The thicker the zinc layer, the better the metal product will perform its protective properties, but the price of the sheet will be higher. Thus, high-quality galvanized sheets are in no way inferior to their more expensive competitor - stainless steel.

In our catalog you can find high quality sheet metal products.

Source: https://metallosfera.ru/polezno_znat/klassicheskie_i_nestandartnie_metodi_primeneniya_otsinkovannogo_lista/

Galvanized sheet - characteristics and application

Galvanized sheets are used in many areas of the economy. This product belongs to sheet metal products. Its peculiarity is that it contains zinc.

Composition and characteristics of galvanized sheet

This sheet basically contains metal and zinc. The latter element covers the product on all sides to protect it from corrosion, which occurs as a result of metal oxidation in the environment.

But there are varieties of the product that are coated with zinc on only one side. This is necessary for further actions with the sheet, for example, bending, cutting, drawing and others.

There are several types of galvanized sheet:

• corrugation;
• corrugated sheeting;
• smooth sheet.

When processing this product, its qualities and technical characteristics are not lost. These include: mechanical strength, flexibility, rolling, corrosion resistance and deep drawing stamping.

Where is galvanized sheet used?

Its use is not limited to specialized, highly targeted plants or factories. Galvanized sheets are actively used in construction, mechanical engineering, industrial enterprises, engraving, instrument making, and as roofing.

If you use a low-quality product, it will not be able to resist corrosion, withstand various loads, or be used in any climatic conditions.

Types of zinc coated sheet

This product has its own areas of use, so there are different types.

Depending on the goals and objectives, it is carried out:

• for general purpose;
• for the production of corrugated sheets (cold profiling);
• for cold stamping;
• for subsequent painting (trained group).

Quality requirements

Galvanized sheets differ in length, width and thickness. But they must strictly comply with production standards (GOST).

Such rolled metal products are produced in accordance with GOST 14918-80 (galvanized steel is made from carbon coil material with a certain surface quality as a result of cold rolling; aluminum, lead and other metals are added during the galvanizing process). For the production of high-quality surfaces, there are standards that comply with GOST 16523-89.

Depending on the purpose, galvanized sheets are made:

• with normal thickness variation;
• reduced thickness variation.

To produce high-quality rolled metal products, zinc TsO, Ts1, Ts2 is used in accordance with GOST 3640-79. It can be presented to the buyer in sheets and rolls.

Where to buy

The Metal-Magnit company has established itself as a reliable organization for the sale of rolled metal products. The sizes, types and technical characteristics of these products can be found on the company’s website. The company enjoys a good reputation as a supplier of rolled metal products and has many positive reviews from customers.

Metal-Magnit cooperates only with reliable and trusted suppliers, so all rolled metal products are of high quality in accordance with generally accepted production standards. The company's employees use an individual approach to the requirements and requests of each client, guaranteeing the quality of the product, ease of handling, resistance to aggressive environments and durability.

Source: http://www.udec.ru/sadoved/ocinkovannyi-list.php

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