GOST 9850-72 PDF

Full title and description

GOST 9850-72 — "Проволока стальная оцинкованная для сердечников проводов. Технические условия" (English: Zinc-coated steel core wire for conductors — Specifications). The standard establishes technical requirements for hot‑dip zinc‑coated round steel wire intended for use as cores in uninsulated steel‑aluminium and steel‑bronze conductors.

Abstract

GOST 9850-72 specifies materials, mechanical-property classes, dimensional tolerances, zinc‑coating mass classes and surface quality requirements for galvanized steel wire used as conductor cores. It was developed for the electrical‑cable sector to ensure reproducible strength, corrosion resistance and compatibility with conductor manufacturing processes.

General information

• Status: Active (standard in force / "действует").
• Publication date: Introduced 01 July 1974 (approved by the USSR State Committee for Standards by decree dated 07.12.1972).
• Publisher: Approved and put into effect by the State Committee for Standards of the USSR (original publisher); historically issued as an interstate (GOST) standard.
• ICS / categories: ICS 77.140.65 (wire and wire products / electrical conductors).
• Edition / version: Original designation ГОСТ 9850‑72; introduced 1974 and published with subsequent amendments (amendments Nos. 1–5 issued during 1979–1987 in available records).
• Number of pages: 10 pages (typical text length for the published document).

Scope

This standard applies to round hot‑dip galvanized steel wire manufactured for use as cores in uninsulated steel‑aluminium and steel‑bronze conductors (single‑wire and multi‑wire cores). It covers permitted steel grades, mechanical classes, wire diameters, dimensional tolerances, minimum zinc mass per surface area groups, surface quality criteria and marking/packaging rules.

Key topics and requirements

• Material basis: carbon steel grades specified by reference standards (commonly steels per GOST 14959 or equivalent grades used for wire cores).
• Mechanical classes: wire is grouped by mechanical properties (commonly designated classes A, B, V).
• Dimensional range and tolerances: typical diameters from about 1.85 mm up to 4.50 mm with defined allowable deviations and different tolerance groups.
• Zinc coating groups: surface zinc mass specified by groups (group 1 and group 2) with minimum g/m² values varying by diameter.
• Surface and quality requirements: limits on surface defects (tubercles, beads, white rust, nonuniformities) and acceptance criteria after drawing and coating.
• Marking, packaging and mass of coils/packaging practices appropriate for transport and storage in conductor manufacture.

Typical use and users

Primary users are electrical‑cable and conductor manufacturers, wire producers, procurement specialists, technical quality inspectors and suppliers of galvanized wire for power transmission conductors and similar industrial cable products. The wire is used as cores for steel‑aluminium and steel‑bronze conductors as well as in reinforced wire assemblies.

Related standards

GOST 9850‑72 replaced the earlier GOST 9850‑61 and in parts corresponds to international/IEC documents for conductor wire classes; in practice manufacturers sometimes compare or substitute modern EN/IEC specifications (for example EN 50189 is referenced in industry discussions when aligning galvanized wire properties to European practice). Relevant adjacent standards include national GOSTs for wire steel grades (GOST 14959 and others) and other conductor/cable standards.

Keywords

GOST 9850-72, galvanized steel wire, zinc-coated wire, conductor core, wire for conductors, steel-aluminium conductor, steel-bronze conductor, mechanical classes, zinc coating mass, wire tolerances.

FAQ

Q: What is this standard?

A: GOST 9850‑72 is a Soviet/Interstate technical standard that sets requirements for hot‑dip zinc‑coated round steel wire intended for use as cores in electrical conductors.

Q: What does it cover?

A: It covers material grades, mechanical property classes, permitted diameters and tolerances, minimum zinc‑coating mass by group, surface quality and marking/packaging rules for conductor core wire.

Q: Who typically uses it?

A: Wire manufacturers, conductor/cable producers, purchasing and QA departments in power‑engineering and cable industries, and suppliers of galvanized wire for conductor cores.

Q: Is it current or superseded?

A: Available records and standards catalogs list ГОСТ 9850‑72 as "действует" (in force) with historical amendments; however, in some supply chains manufacturers may reference or transition to newer international standards (e.g., EN/IEC documents) for interoperability. Users should check the current national standards catalog or the issuing standards body for any revisions or national replacements before critical procurement.

Q: Is it part of a series?

A: It forms part of the family of GOST documents regulating wire and conductor materials (it replaced GOST 9850‑61 and is referenced alongside other GOSTs for steel grades and conductor construction). It is often used together with standards governing conductor design and steel grades.

Q: What are the key keywords?

A: Zinc‑coated steel wire, conductor core, galvanized wire, mechanical class A/B/V, zinc coating mass (groups 1/2), diameters 1.85–4.50 mm, wire tolerances, GOST 9850‑72.