GOST 30249-97 PDF

Full title and description

GOST 30249-97 — Cast iron brake blocks for locomotives. Specifications. Technical conditions for grooved cast‑iron brake blocks intended for installation on locomotives of 1520 mm gauge; sets out material, dimensional, mechanical and acceptance requirements and test methods.

Abstract

This interstate standard (GOST 30249-97) establishes technical requirements, inspection and testing methods, transportation and storage rules, and manufacturer guarantees for cast‑iron (grooved) brake blocks used on mainline locomotives. It covers chemical composition limits for specified cast‑iron grades, geometric and hardness criteria, steel backing and frame requirements, destructive and non‑destructive acceptance tests, and provisions for sampling and lot acceptance.

General information

• Status: Active / In force (introduced as a new interstate standard and adopted into the Russian system; shown as действующий).
• Publication date: Adopted 1997 (protocol 21 Nov 1997); formally introduced into force in the Russian Federation by resolution of 10 June 1998 and effective 1 July 1999.
• Publisher: Adopted by the Interstate Council on Standardization, Metrology and Certification; introduced into the Russian Federation by the State Committee (Gosstandart).
• ICS / categories: ICS 45.060.10 (railway rolling stock parts / brake equipment); OKP/industry classification references appear in catalog listings.
• Edition / version: Original designation 30249-97 (1997); entered into force 1999; re‑issued (reprint) in June 2005; commercial reprints/updated printings available with later editorial updates.
• Number of pages: Typical published leaflet/booklet editions list 11 pages (A4).

Scope

Specifies technical conditions for grooved cast‑iron brake blocks (type M and related designations) intended for installation on locomotives of the 1520 mm gauge. The standard applies to material selection (grades of cast iron), casting tolerances, geometric dimensions, hardness requirements, steel backing integrity, acceptance sampling, destructive and non‑destructive tests, packaging, transportation and storage. It is intended for manufacturers, repair organizations and procurement bodies dealing with locomotive brake blocks.

Key topics and requirements

• Chemical composition limits and permitted deviations for specified cast‑iron grades used in brake blocks (tables of elemental percentages and tolerances).
• Dimensional and casting accuracy requirements (casting tolerances, model kit/parting line allowances per referenced GOSTs).
• Hardness ranges (Brinell test locations and acceptance limits) and sampling procedures for hardness testing.
• Requirements for steel backing (spine) embedding, minimum destructive strength (specified breaking load), and procedures for break‑off tests.
• Acceptance rules: lot formation, sampling percentages for chemical, hardness and mass checks, criteria for re‑testing and lot rejection.
• Referenced normative documents and test methods (e.g., GOSTs on corrosion protection, casting tolerances, metallurgical test methods and hardness measurement).

Typical use and users

Primary users are locomotive manufacturers, rolling‑stock repair depots, foundries producing brake blocks, quality and testing laboratories, procurement and certification bodies for railway equipment, and maintenance departments of rail operators. The standard is used to specify procurement technical requirements, to set manufacturing and inspection procedures, and to support certification and acceptance testing of brake blocks.

Related standards

The standard references and is used alongside other GOSTs that cover: corrosion protection (GOST 9.014‑78), casting tolerances and model kits (GOST 3212‑92, GOST 26645‑85), methods for mechanical and metallurgical tests (GOST 27208‑87 and related analysis methods), hardness measurement (GOST 9012‑59 / Brinell), and additional steel/cast material specifications cited in its normative references.

Keywords

GOST 30249-97; brake blocks; cast iron; locomotive brake shoes; locomotive parts; acceptance tests; hardness; chemical composition; steel backing; locomotive maintenance; rolling stock parts; 1520 mm gauge.

FAQ

Q: What is this standard?

A: GOST 30249-97 is an interstate technical standard that sets specifications and acceptance requirements for grooved cast‑iron brake blocks intended for locomotives (1520 mm gauge). It defines material, dimensional and testing requirements for these brake blocks.

Q: What does it cover?

A: It covers chemical composition of cast iron grades, casting and dimensional tolerances, hardness and strength requirements, steel backing integrity, sampling and acceptance procedures, test methods, transportation and storage, and manufacturer guarantees.

Q: Who typically uses it?

A: Manufacturers of locomotive brake blocks, foundries, rolling‑stock repair shops, rail operator maintenance and procurement teams, and testing/certification laboratories.

Q: Is it current or superseded?

A: The document is shown as an active/in‑force interstate standard and was introduced into force in Russia on 1 July 1999; reprints and editorial reissues (e.g., 2005) exist and commercial vendors publish updated print editions. Users should verify the edition and any national amendments before procurement.

Q: Is it part of a series?

A: It is a standalone technical (interstate) specification for a specific product group (brake blocks) and references several related GOSTs for test methods and material standards; it was adopted through the Interstate Council and brought into national use by Gosstandart actions.

Q: What are the key keywords?

A: Brake blocks, cast iron, locomotive, hardness, chemical composition, acceptance tests, steel backing, casting tolerances, 1520 mm gauge.