GOST 503-81 PDF

Full title and description

GOST 503-81 — Cold-rolled low-carbon steel strip. Technical specifications. Establishes classification, mechanical and chemical requirements, dimensional and form tolerances, surface quality, testing, packaging and marking for cold-rolled strips (tape) produced from low‑carbon steels.

Abstract

This standard sets requirements for cold‑rolled strips of low‑carbon steel intended for general engineering and forming applications. It covers assortment (thickness, width, edge type), accuracy grades, surface quality groups, allowable defects, coil parameters, tests for mechanical and chemical properties, tolerance and flatness limits, and rules for sampling, packaging and marking. Several amendments were later approved to clarify tolerance, coil and testing provisions.

General information

• Status: In force / active (standard with subsequent amendments).
• Publication date: Adopted 1981; introduced into force January 1, 1983; amended in 1983, 1987, 1989 and 1992.
• Publisher: State Committee for Standards of the USSR (Gosstandart); currently catalogued in the Russian/EAEU standards system.
• ICS / categories: 77.140 (Iron and steel products) — Flat steel products and semi‑products (77.140.50).
• Edition / version: GOST 503-81 (base edition) — issued with Amendments No. 1–4 (revisions published 1983–1992).
• Number of pages: Approximately 15 pages (typical published text length).

Scope

Applies to cold‑rolled strips (narrow strip/tape) made from low‑carbon steels intended for stamping, bending, manufacture of pipes, wire cores, components and other metal products. The standard defines product designation, classification by quality and precision, dimensional and form tolerances, surface quality groups, permissible defects, coil geometry and mass, testing methods and quality documentation. Where customer and manufacturer agree, some parameters (for example flatness or coil dimensions) may be varied in delivery contracts.

Key topics and requirements

• Classification and assortment: thickness, width, edge type (cut or mill), precision/accuracy grades and surface quality groups.
• Chemical composition: steel grades for various quality levels and maximum contents for C, S, P for special grades (e.g., vacuum or high‑quality tape).
• Mechanical properties and testing: tensile, elongation and bend tests with specimen types and methods referenced to applicable test GOSTs.
• Dimensional tolerances: thickness and width tolerances by accuracy grade; coil inner and outer diameter limits and permitted roll mass ranges.
• Flatness, camber and non‑planarity: maximum allowable waviness/warpage values by width bands and methods of measurement; allowances for annealed material and agreed tolerances between supplier and customer.
• Surface quality and defects: grouping of surface appearance (group 1–4), permitted defects, and sampling procedures for inspection.
• Packaging, marking and documentation: coil marking, packing methods, weight verification and required quality certificates from the manufacturer.
• Reference test and measurement methods: cross‑references to other standards for roughness, etching, metallographic examination and weighing instruments.

Typical use and users

Used by steel producers and cold‑rolling mills, quality/inspection departments, metal fabricators, component manufacturers (automotive, appliances, electrical), pipe and tube producers, fastener and spring manufacturers (where applicable), procurement and QA specialists, and conformity assessment bodies working with Russian or EAEU technical requirements.

Related standards

Commonly used together with and referencing other GOSTs such as steel grade specifications (e.g., GOST for common carbon steels), test method standards for tensile and bend tests, surface roughness measurement standards, etching and metallographic methods, and standards for weighing, packaging and marking. The document replaces earlier editions of GOST for cold‑rolled low‑carbon strip and is part of the suite of flat steel product specifications in the 77.140 ICS group.

Keywords

GOST 503-81; cold‑rolled strip; low‑carbon steel; tape; coil; thickness tolerances; flatness; surface quality; mechanical tests; chemical composition; packaging; marking.

FAQ

Q: What is this standard?

A: GOST 503-81 is a Soviet/Russian standard titled "Cold‑rolled low‑carbon steel strip. Technical specifications" that sets technical, dimensional and testing requirements for cold‑rolled low‑carbon steel strips.

Q: What does it cover?

A: It covers classification (thickness, width, edge type), accuracy and surface quality grades, chemical and mechanical property requirements, flatness and coil geometry limits, test and sampling methods, packaging, marking and quality documentation.

Q: Who typically uses it?

A: Steel mills and cold‑rolling plants, metal fabricators, manufacturers that process strip into parts (automotive, appliances, pipes, fasteners), procurement and quality assurance teams, and regulatory/conformity bodies within the Russian/EAEU market.

Q: Is it current or superseded?

A: The base standard GOST 503-81 is published with a series of amendments (issued through the late 1980s and early 1990s). It is catalogued as an active/operative standard in Russian/EAEU libraries, though users should verify whether a newer national or industry standard or a regional technical regulation has since replaced or amended specific requirements for their application.

Q: Is it part of a series?

A: Yes. It is part of the family of GOST standards covering flat steel products and semi‑finished steel (ICS 77.140). It replaces earlier GOST editions for cold‑rolled low‑carbon strip and cross‑references other GOSTs for steel grades, test methods and measurement procedures.

Q: What are the key keywords?

A: Cold‑rolled strip, low‑carbon steel, tape, coil, thickness, width, flatness, surface quality, GOST 503-81.