GOST 28870-90 PDF

Full title and description

GOST 28870-90 — Steel. Methods of tensile tests of rolled thick-plates in the thickness direction. The standard specifies sampling, specimen form and dimensions, test conditions and evaluation criteria for tensile tests performed through the thickness of rolled steel plates (thick plate).

Abstract

GOST 28870-90 defines methods for preparing and tensile-testing specimens taken in the thickness direction of rolled steel plates (thick-plate products) to determine mechanical characteristics such as elongation after rupture and reduction of area; other characteristics (ultimate tensile strength and yield strength) are to be determined in accordance with GOST 1497 where applicable. The standard covers plates with nominal thicknesses from 15 mm to 160 mm and specifies ambient test temperature conditions.

General information

• Status: In force / active (interstate state standard introduced for use).
• Publication date: Date of introduction 1 January 1992 (approved by Decision of the USSR State Committee on standards 29 December 1990).
• Publisher: Approved and published under the authority of the USSR State Committee for Product Quality Management and Standards (Gosstandart); developed by the USSR Ministry of Metallurgy.
• ICS / categories: Metallurgy — testing of metals (ICS 77.040) and iron & steel products (ICS 77.140) — mechanical testing of steel plate products.
• Edition / version: Original issue (designated -90) — first introduction in 1992 (document designation: GOST 28870-90).
• Number of pages: 6 pages (standard text with mandatory Annex 1 and informative annexes for specimen manufacture and classification).

Scope

This standard applies to rolled steel thick-plates and establishes procedures for tensile testing in the thickness direction (through-thickness specimens). It is intended for plates with normalized minimum yield strength up to about 600 N/mm² and thickness range from 15 mm to 160 mm, and it defines sampling rules, specimen types and dimensions, test temperature (ambient range around 20 °C with allowed tolerance), and the properties to be reported (chiefly relative elongation and relative narrowing after fracture).

Key topics and requirements

• Sampling: selection points and number of specimens per plate; sampling methods reference GOST 7564 requirements.
• Specimen geometry and dimensions: mandatory specimen types and dimensional tables (Annex 1) with working diameter and length depending on plate thickness.
• Test conditions: tensile tests performed at ambient temperature specified in the standard (nominal 20 °C with allowed deviations).
• Measured characteristics: primary focus on relative elongation after rupture and relative reduction of area; determination of tensile strength and yield strength is permitted in accordance with GOST 1497.
• Permitted specimen preparation methods: mechanical cutting, and—under specified rules—use of welded or surfaced blanks for specimens (recommendations and restrictions on welding consumables and procedures included).
• Normative references and alignment: standard cites and aligns with relevant GOST documents (e.g., GOST 1497, GOST 7564, GOST 10051) and states full compliance with ISO 7778:1983 where applicable.

Typical use and users

Used by steel producers, quality and testing laboratories, metallurgical inspection bodies, product certification organizations, and purchasers of thick-plate steel to verify through-thickness mechanical properties and to classify plate quality for structural and pressure applications.

Related standards

Commonly referenced standards include GOST 1497 (methods for tensile testing and terminology), GOST 7564 (sampling for tests), GOST 10051 (welding electrodes — restrictions noted), and international standard ISO 7778 (corresponding tensile test methods). The standard sits within the family of GOSTs covering mechanical testing and steel product requirements.

Keywords

steel; thick-plate; rolled plate; tensile test; through-thickness testing; specimen geometry; relative elongation; reduction of area; sampling; GOST 28870-90; ISO 7778.

FAQ

Q: What is this standard?

A: GOST 28870-90 is a Soviet/Interstate standard that specifies methods for tensile testing of rolled thick-plates in the thickness (through-thickness) direction to determine ductility-related properties and, where applicable, strength characteristics.

Q: What does it cover?

A: It covers sampling, specimen types and sizes, test temperature and procedure, measurement and reporting of elongation and narrowing after rupture, permitted specimen preparation methods (including specific welding/surfacing rules), and references to related test standards. The plate thickness range addressed is roughly 15–160 mm.

Q: Who typically uses it?

A: Metallurgical laboratories, steel mills, product inspection and certification bodies, procurement and quality engineers in industries using heavy steel plate (construction, pressure vessels, heavy machinery).

Q: Is it current or superseded?

A: The document is the original 1990-designated standard introduced 1 January 1992 and is listed in current catalogs as in force / active; users should verify local applicability and whether a more recent national or interstate replacement applies to a specific procurement or certification case.

Q: Is it part of a series?

A: It forms part of the family of GOST standards on steel product testing and quality; it cross-references other GOST test methods (for tensile testing, sampling and welding) and explicitly states compatibility with ISO 7778:1983.

Q: What are the key keywords?

A: steel, thick-plate, tensile test, through-thickness, elongation, reduction of area, specimen dimensions, sampling, GOST 28870-90, ISO 7778.