Technologies for the production of steel sheets by cold and hot rolling

Rolled sheets are a category of products made from asbestos cement, ferrous and non-ferrous metals, and their alloys. A distinctive feature of this type of rolled metal is the rectangular shape of the product. The chemical composition of the alloy and the linear parameters of the product are regulated by GOST standards for each type of rolled product.

Sheet and rolled metal products are used in mechanical engineering, construction, electric power, aircraft manufacturing, and shipbuilding. The scope of application depends on the type and brand of metal, the chemical composition of the alloy, technical characteristics, and method of production of the product.

Main characteristics of hot-rolled sheets

The popularity of hot-rolled steel coils is explained by their excellent properties, namely:

• large production volumes and availability in warehouses;
• high weldability rates;
• good anti-corrosion properties;
• resistance to temperature changes;
• uniform surface;
• wide application in all industries;
• low cost and availability;
• resistance to mechanical damage, impact resistance.

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Production Features

Most often, hot rolling is used in the production of steel sheets. More details about the scope of application of steel sheets made using hot rolling technology will be discussed below.

This block is made with the aim of introducing you to the features of this material, which allow it to remain at the top of the metal production market. The technique for producing hot-rolled sheets, although it looks somewhat complicated and confusing, is actually not so.

The whole process begins with the installation of special machines at the desired height. Next comes the activation of the heating elements and when they reach the desired temperature, rolling begins. Special metal blanks are involved in rolling.

Through several runs and general heat treatment, the workpieces are brought to the required aggregate conditions, after which they are sent to harden in special chambers. This is necessary so that they harden as much as possible and retain their shape for a long time.

There are several types of hot rolled metal sheet. Basically, they differ in size. Most often, specimens from 2 to 4 millimeters in thickness are produced. This difference is explained by the widespread use of metal sheets. From small-scale production of electrical appliances to large-scale construction.

Sheet metal

Rolled sheets are a type of metal profile with durability and high strength. There are several options for rolled metal that have normal or increased accuracy.

Technical features

Rolled sheet metal is divided into two types according to thickness:

• Thick sheet – profile thickness from 4 mm. up to 160 mm.
• Thin sheet – maximum thickness 3.9 mm.

Depending on the characteristics of production and surface, products can be of the following types:

• Profiled sheeting;
• Perforated or expanded metal plates;
• Corrugated sheets (lentil or rhombic corrugation);
• With and without galvanization.

The most important classifier is the type of metal rolling - hot-rolled or cold-rolled sheet.

Cold rolled sheets

Sheets produced on a rolling machine by cold rolling steel with high ductility. The material is distinguished by its improved quality of the surface layer. The hardness and thickness (0.35-5 mm) of sheet profiles are different.

The main advantages of cold-rolled metal products:

• High quality surface. Varnishes and paints can be applied without pre-treatment;
• Resistance to temperature deformation during welding.

Rolled products of this type are used as blanks for the production of:

• Profiled sheeting;
• Galvanized roofing sheet;
• Perforated plates.

Cold rolled steel is recommended for the production of structures that place high demands on precision. In addition, it is actively used in cases where it is not desirable or simply not desirable to carry out labor-intensive procedures for treating the surface for painting.

Hot rolled sheets

The products are manufactured on a rolling machine by hot rolling of steel with further high-temperature processing. Rental products of this type are classified into the following groups:

• Tolstolistova. Produced in accordance with GOSTs 19903-74 and 1577-93 (structural sheets with the possibility of temperature treatment). Available in hardened and hot rolled condition. Thickness – up to 160 mm;
• Thin-sheet. The thickness is maximum 3.9 mm. Requirements for production are regulated by GOST 16523-89. Sheets can have a cut edge (with a thickness of 0.4 mm.) and are offered in rolls (with a sheet thickness of 1.2 mm.). A separate category includes structural plates with unetched and etched surfaces.

Hot rolled sheets can be:

• Low alloyed. Material of manufacture – low carbon steel. The sheets are used for the production of welded structures. The advantage is affordable cost. An actual product for the manufacture of riveted bridge structures, seam pipelines, and non-critical elements;
• Structural. The raw material for production is carbon alloy steel. The main area of ​​use is the production of critical parts of industrial mechanisms and equipment.

Characteristic advantages:

• High weldability;
• Variety of species;
• Surface quality;
• Thermal stability;
• Favorable cost;
• Resistance to mechanical stress;
• Ease of processing;
• Corrosion resistance.

Products and structures made from hot-rolled sheets can be used in fresh air conditions.

Corrugated Sheets

Profiled cold-rolled galvanized plates, wave-shaped, 0.4-0.75 mm thick. Products are manufactured in accordance with GOST 14819-80

Area of ​​use:

• Cladding of partitions and walls;
• Creation of industrial roofing and decking of high rigidity;
• Production of sandwich panels;
• Manufacturing of internal partitions;
• Production of fences and fencing.

Galvanized sheet metal

The raw material is cold-rolled carbon steel coils. Sheet width – 710-1800 mm, thickness 0.5-2.5 mm.

Sheets on the surface of which there is a layer of zinc. Anti-corrosion protection can be on one or both surfaces. High-quality rolled products manufactured according to the regulations of GOST 14819-80.

Galvanized rolled metal is used in medicine and the food industry, for finishing structures and buildings, and for roofing work.

Special properties: ease of installation, high strength and long service life, resistance to corrosion.

Corrugated rolled products

Production material – carbon steel. Products are manufactured in rolls and sheets with normal or high precision. Production is regulated by GOST 380-88.

Sheet metal, on the surface of which there is a lenticular or diamond-shaped embossing. The thickness of products is indicated without taking into account protrusions. Embossing can be double- or single-sided.

Main scope of application:

• Use as ventilation grilles and cladding panels;
• Creating an anti-slip floor covering.

Corrugated sheet metal can be used to cover the steps of staircase structures and cladding floorings used in conditions of high humidity.

Scope of use

Rolled sheets are an indispensable product in the construction and manufacturing industries. Using it, they produce all kinds of metal structures and different types of profiles - strips, channels, corners. The scope of application is determined by the type of sheets.

Terms of delivery of products: “Sheet rolling” in Novosibirsk

• Delivery in the Novosibirsk region and other regions of the Russian Federation is carried out by transport companies on terms favorable to the customer.
• Delivery in Novosibirsk is carried out from the warehouse closest to the customer.
• There is a possibility of self-pickup of purchased products.

Terms of sale in Novosibirsk

• can supply wholesale and retail almost all items from the catalog.
• Payment is made both by bank transfer and in cash.
• We can offer a deferment for regular clients.
• If you need metal products of non-standard sizes or rare grades of steel, we can organize production.
• We organize packaging of goods according to standards.

Guarantees

• Rolled metal has all the necessary certificates.
• Complies with regulatory documents.
• We guarantee the return of goods if the delivery is found to be defective.

We provide all related services:

• cutting
• bending
• Application of protective coatings

Types of sheet metal

There are two types of rolled products: hot-rolled and cold-rolled.

• thin - no more than 4 mm, presented in the form of a roll, processed by etching;
• thick - sheet thickness varies from 4 to 160 mm;
• low-alloy - made from low-alloy alloys, characterized by low cost; used in construction and industry;
• structural - made of alloyed carbon alloys, used in mechanical engineering.

Hot-rolled sheets are suitable for metal structures installed outdoors. Barbecues and safes are made from it.

Advantages of hot rolled steel:

• high surface quality;
• simple processing;
• resistance to temperature conditions.

Cold rolled sheets are a type of product that is produced by rolling from ductile steel alloys. Products are obtained in different thicknesses from 0.35 to 5 mm. Rolled sheets for welding metal structures have high accuracy. The product produced by the cold-rolled method can be used for roofing, as well as for the production of corrugated sheets and perforated sheets.

Advantages of cold rolled steel:

• does not require additional processing;
• resistance to thermal deformation;
• excellent quality top layer.

Separately, corrugated sheet metal, galvanized sheet metal and corrugated sheet metal are distinguished.

Corrugated sheets are rolled metal that has a surface deformed in a special way. It is made in the form of diamonds or lentils. Sheets can have single- or double-sided embossing. Carbon steel alloys are used in the production of rolled products. Corrugated sheets are produced in the form of rolls. They are actively used in laying flooring to increase friction force. Also suitable as cladding and ventilation panels.

Galvanized sheets are rolled metal obtained by galvanizing. The products are of high quality and are manufactured using the cold-rolled method. According to the standard, the thickness of the product varies from 0.5 to 2.5 mm, width - from 710 to 1800 mm. Galvanized sheets are in demand in the construction industry: they are used during the installation of roofing and cladding of buildings. In addition, rolled sheets are used in medicine and the food industry.

Advantages of galvanized sheets:

• strength;
• long service life;
• easy installation.

Corrugated sheets are rolled metal in the shape of a wave. They are produced by cold-rolling and galvanizing. Corrugated sheets are used for:

• installation of roofs for industrial enterprises;
• construction of fences;
• wall cladding;
• creating roofing decking;
• as a component of sandwich panels.

Features of choice

Before you start seriously selecting specific hot rolled sheets, here are a few helpful tips:

1. Strictly and irrevocably establish the purpose of your sheets. Buying material just like that, in the hope that you will later find a use for it, is very stupid and reckless.
2. Don't save money. Yes, construction and repairs are extremely expensive, but you definitely shouldn’t skimp on such large-scale materials. This may affect the safety and durability of the final structure.

Delivery cities

For many years it has been supplying rolled metal products and has established itself as a reliable supplier. We are already working with the following cities: Khanty -Mansiysk, Surgut, Nefteyugansk, Nizhnevartovsk, Yugorsk, Pelym, Sovetsky, Priobye, Andra. Yamalo- Nenets Autonomous Okrug: Novy Urengoy, Muravlenko, Noyabrsk, Nadym, Yar-Sale, Aksarka, Labytnangi, Salekhard, Gubkinsky, Khanymei, Khari, Tazovsky, Purpe, Krasnoselsk. And also : Ufa, Kazan, Samara, Moscow, Yekaterinburg, Orenburg, Kazakhstan, Astana, Irkutsk, Yakutia, Norilsk, Penza, Krasnoyarsk and many others .