GOST 25577-83 PDF

Full title and description

GOST 25577-83 — "Profiles steel bent closed welded square and rectangular. Specifications" (Russian: ГОСТ 25577-83, Профили стальные гнутые замкнутые сварные квадратные и прямоугольные. Технические условия). The standard specifies dimensions, tolerances, technical requirements, manufacturing and acceptance rules, test methods, and packaging/marking for hot-formed closed welded square and rectangular steel profiles used in machinery and structural applications.

Abstract

This interstate (GOST) standard defines the product range, dimensional series, material grades, welding and quality requirements, allowable geometric deviations, acceptance and testing procedures, and packaging/marking rules for closed welded square and rectangular steel profiles. It includes amendments (No. 1 and No. 2) that update technical and acceptance provisions. Typical applications called out include agricultural machinery, tractor manufacture and related industrial uses.

General information

• Status: National / interstate GOST standard (with Amendments No. 1 and No. 2). Sources vary on current national registration status—the text and amendments are widely referenced and used in product specifications.
• Publication date: Approved 5 January 1983; date of introduction (into effect) 1 January 1984.
• Publisher: USSR State Committee for Standards (Gosstandart of the USSR); developed with the Ministry of Ferrous Metallurgy; later circulated via interstate/national standards collections.
• ICS / categories: Metallurgy — steel products; classified under steel profiles / rolled and formed steel products (ISO/ICS metallurgy classification equivalent: 77.140.70).
• Edition / version: Original GOST 25577-83 with Amendments No. 1 and No. 2 (amendments approved February 1988 and July 1989).
• Number of pages: Typical electronic copies and catalogue entries list the standard as approximately 5 pages (concise technical specification).

Scope

Applies to hot-formed, closed, welded steel profiles of square and rectangular cross-section intended for use in agricultural machinery, tractors and related sectors. The standard covers allowable sizes and wall thicknesses, radii of curvature, mass per metre, reference section properties, material grades acceptable for manufacture, geometric tolerances (height/width, curvature, twist, concavity/convexity), weld quality and strength, acceptance sampling, test methods, and packaging/marking requirements. The document is intended for manufacturers, quality laboratories and purchasers specifying profile products to GOST requirements.

Key topics and requirements

• Product range and cross‑section tables (nominal sizes, wall thicknesses, mass per metre and reference section properties).
• Material grades permitted for manufacture (e.g., common carbon steels such as St3 variants, grades 20/20ps, and certain low‑alloy steels like 09G2 — with reference normative GOSTs for chemical/mechanical requirements).
• Dimensional tolerances: limit deviations in height/width by size and wall thickness (examples: ±1.5 mm for profiles up to 100 mm, ±2.0 mm for larger; adjusted allowances for thicker walls).
• Geometric quality limits: maximum curvature along length, twist (degrees per metre limits), convexity/concavity limits of walls, allowable deviation from 90° corner angle, and limits for welded edge misalignment and residual burr height.
• Welding and weld quality: permitted incomplete fusion lengths, maximum total length of defects per metre by thickness class, and requirement that weld strength not be lower than base metal; visual continuity checks and specified destructive tests where applicable.
• Acceptance and test methods: sampling and acceptance rules per referenced GOST 11474 and specific test methods for dimensional checks, curvature, twist, weld tensile tests (GOST 6996), and other measuring procedures (GOST 427, GOST 166, GOST 5378).
• Delivery lengths and permissible length deviations (standard produced lengths 9.0–11.8 m with measured or random length options; shorter lengths by agreement; permissible positive deviation along measured length).
• Packaging, marking and transport: requirements referenced to GOST 11474 (packing/marking/transport practices for profiled steel products).

Typical use and users

Manufacturers of profiled steel sections, steel mills and profile-forming plants, suppliers of structural sections, purchasers and specifiers in agricultural machinery and tractor construction, structural and mechanical engineers, welding and quality control laboratories, and procurement departments that reference Soviet/Russian GOST technical specifications for industrial products. The standard is also used by steel product distributors and fabricators who produce or incorporate closed welded square/rectangular profiles into assemblies.

Related standards

GOST 11474 (technical requirements, acceptance and test methods for profiles), GOST 1050 (steel grades), GOST 14637 and GOST 16523 (rolled steel grades/specifications), GOST 19281 (low-alloy steels), GOST 6996 (weld tensile testing), GOST 427 (metal line for curvature), GOST 166 (caliper measurement), GOST 5378 (protractor measurements), plus other product/steel‑making and test standards referenced within the standard. These referenced GOSTs provide material, measurement and test method detail that GOST 25577-83 relies on.

Keywords

steel profile, closed welded profile, square profile, rectangular profile, bent profile, welded tube, dimensional tolerances, weld quality, GOST 25577-83, technical conditions, agricultural machinery profiles.

FAQ

Q: What is this standard?

A: GOST 25577-83 is an interstate (GOST) technical standard that sets technical requirements, dimensions, tolerances, testing and acceptance rules for hot-formed closed welded square and rectangular steel profiles.

Q: What does it cover?

A: It covers the assortment (size series), nominal dimensions and reference section properties (mass per metre, moments, inertia), allowable geometric deviations (height/width, curvature, twist, wall convexity/concavity), welding quality and strength requirements, acceptance and test methods, delivery lengths, and packaging/marking. The standard references a number of material and test GOSTs for specifics.

Q: Who typically uses it?

A: Steel profile manufacturers, fabricators, equipment builders (notably in agricultural and tractor industries), structural/mechanical engineers, steel product distributors and quality/control laboratories that inspect or certify profile products.

Q: Is it current or superseded?

A: The standard was approved on 5 January 1983 and introduced 1 January 1984; Amendments No. 1 and No. 2 were issued in 1988 and 1989. Different registries and commercial catalogue services list and distribute the text (some label it active for product specification use); other archival sources note standard validity/registration periods in historical listings. For legal/regulatory status in a specific country or current national adoption, consult the national standards registry or the current catalog of standards — the primary sources cited here should be used to confirm up‑to‑date legal status.

Q: Is it part of a series?

A: It is one of a set of GOST standards covering steel profiles, welded tubes and profile products; it references and is used alongside other GOSTs that regulate materials, tests and profile technical conditions (see Related standards above). Some product families have separate GOSTs for other profile types and production methods.

Q: What are the key keywords?

A: steel profile, closed welded profile, square section, rectangular section, tolerances, weld strength, acceptance rules, GOST 25577-83.