Description
Cold-Rolled Steel Sheet is a high-quality flat rolled product produced by cold rolling with subsequent heat treatment. It features precise geometric dimensions and high surface quality, making it in demand in precision industries.
Production Technology

The manufacturing process includes the following stages:
1.    Preparation of Hot-Rolled Blank: Use of hot-rolled coil as starting material.
2.    Pickling: Removal of scale in acid baths.
3.    Cold Rolling: Multiple reductions on cold rolling mills to the required thickness.
4.    Annealing: Heating in a protective atmosphere to relieve strain hardening stresses.
5.    Skin-Pass Rolling (Temper Rolling): Final thickness calibration and improvement of mechanical properties.
6.    Cutting: Cutting into sheets or coils of required sizes.
7.    Coating Application: Galvanizing, painting, etc.

Characteristics and Assortment
•    Sheet Thickness: from 0.35 to 5.0 mm.
•    Width: from 1000 to 1500 mm.
•    Length: from 2000 to 6000 mm.
•    Steel Grades: 08ps, 08Yu, St3sp, 10-20-40-50, 65G and others.
•    Accuracy Classes:
o    By thickness: normal (A), increased (P), high (V).
o    By flatness: normal (PN), improved (PU), high (PV).
•    Surface Quality: extra high (I), high (II), increased (III).

Advantages
•    High Precision of Geometric Dimensions.
•    Ideal Surface Quality.
•    Uniformity of Mechanical Properties throughout the volume.
•    Ability to Obtain Very Thin Sheets.
•    Good Stamping and forming properties.
•    Stability of Characteristics within a batch.

Areas of Application
•    Automotive Industry: body panels, trim elements.
•    Mechanical Engineering: instrument housings, stamping parts.
•    Electrical Engineering: equipment housings, magnetic cores.
•    Construction: roofing elements, facade systems.
•    Household Appliance Production: refrigerator, washing machine housings.
•    Furniture Industry: office and household furniture elements.

Normative Documentation (GOST Standards)
Main standards regulating the production of cold-rolled sheets:
GOST 19904-2015 – "Cold-rolled steel sheet. Assortment"
•    Defines the assortment of cold-rolled sheets.
•    Establishes limit deviations for dimensions.
•    Regulates requirements for mass and geometry.
GOST 19903-2015 – "Hot-rolled steel sheet" (for the initial blank)
•    Defines requirements for the initial hot-rolled product.
•    Establishes basic technical requirements.
GOST 9045-93 – "Cold-rolled thin steel sheet. Technical specifications"
•    Establishes technical requirements for cold-rolled sheets.
•    Defines mechanical properties and test methods.
•    Regulates surface quality categories.
Additional Normative Documents:
•    GOST 16523-97 – Thin sheet of carbon steel.
•    GOST 14918-80 – Galvanized thin steel sheet.
•    GOST 52246-2004 – Cold-rolled steel sheet for the automotive industry.
Quality Requirements:
•    Surface: absence of defects, scratches, dents.
•    Geometry: high flatness and straightness.
•    Mechanical Properties: compliance with standard requirements.
•    Thickness: minimal deviations over the entire area.