Flat rolled stock is one of the most cost-saving steel products. It is used in manufacturing of various parts by die-forging and construction of lightweight and rigid steel structures. Different types of metal sheets are widely used in transport machine-building, particularly in automobile industry, shipbuilding, agricultural machine building, in electrical engineering industry and other fields of economy. Many household items are made of sheet metal. It is worth to notice that sheet metal is an intermediate product (workpiece) in production of welded pipes and bent shaped products.
Flat rolled stock is classified by many attributes: dimensions, metal chemical composition, mechanical properties, application, etc.

Classification of flat rolled stock based on dimensions considers its thickness, width and length. As it has been said above all flat rolled stock is classified by thickness into two major categories: thick-gauge steel sheet (thickness is 4 mm and more) and thin-gauge sheet (thickness is less than 4 mm.)

Thick-gauge steel sheets have thickness 4 to 160 mm, width 600 to 5300 mm, length up to 50 m. Some sheets with thickness 4 to 16 mm (having width up to 2300 mm) are produced in a form of long strips, winded in rolls. Sheets having thickness more than 60 mm are called slabs.
Thin-gauge metal features wide variety. Thus, thin-gauge steel sheet standards describe such types of it as engineering steel, pickled (annealed and etched), roofing, stainless, electrotechnical steel, etc.

Different types of steel sheets are rolled either one by one (by individual cards), or in a form of long strips, winded into rolls. The latter method of production is much more up-to-date and replaces one-by-one method globally.

Flat rolled stock is classified by chemical composition; note that steel sheets compose most of it. Major part of steel sheets are carbon steel sheets (approx. 78%) and low-alloyed (approx. 20%) steel grades. Alloyed sheets constitute only about 1%, but this share is increasing continuously.

Sheets made of commercial quality (St1kp, St1ps, St1sp, St2kp, St2ps, St2sp, St3kp, St3ps, St3sp, etc.) and quality engineering (08kp, 08ps, 08Yu, 08Fkp, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25, 30) low-alloyed steel grades are used widely. The following steel grades are among the most widespread low-alloyed ones: 09Mg2-16Mg2, 12MgSi-17MgSi, 15MgV, 09Mg2Cu, 09Mg2Si, 09Mg2Si1, 09Mg2SiCu, 15Mg2SiV, 14CrMgSi, 20CrMgSiA-35CrMgSiА, 10CrSiNiCu, 15CrSiNiCu, etc.

Technical specifications for each particular type of products are provided in applicable GOSTs or specifications. These documents are mandatory for manufacturing companies.

GOSTs and specifications provide dimensions for rolled flat stock and possible deviations from rated values (allowances).

There is hot and cold rolled flat stock.

Cold rolling has two major advantages compared to hot rolling: firstly, it allows producing steel sheets thinner than 0.8-1.0 mm, up to several microns, which is impossible for hot rolling; secondly, it allows producing metal sheets of higher quality by all properties – dimensions accuracy, surface finishing, physical and mechanical properties.

But it should be noted that cold rolling procedures are more power-consuming compared to hot rolling ones. During cold deformation process the rolled metal becomes stronger (becomes strain hardened); that’s why annealing should be done in order to restore plastic properties. Cold rolled flat stock manufacturing process comprises a large number of process stages and requires application of complicated and various equipment units.

Most of cold flat rolled stock is made of low-carbon engineering steel 0.5-2.5 mm thick, 2300 mm wide. These thin-gauge steel sheets are widely used in automobile manufacturing, that’s why it is often called automobile steel sheet.

Our company is ready to consider supply of hot and cold flat rolled stock of any required size under any applicable GOST, specification, or international standards.