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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Metal-methods for estimating the average grain size
WITHDRAWN published on 31.12.2002
Selected format:Metallic materials--Stress rupture testing at elevated temperatures
WITHDRAWN published on 1.1.1986
Selected format:Method of mechanical property testing for clad steel plate and sheet
WITHDRAWN published on 1.1.1986
Selected format:Clad plates—Machanical and technological test
WITHDRAWN published on 11.4.1995
Selected format:Metallic materials--Test pieces for tensile testing
WITHDRAWN published on 17.5.1986
Selected format:Standard test method for fatigue crack growth rates of metallic materials
WITHDRAWN published on 17.11.2000
Selected format:The test method for axial loading constant-amplitude low-cycle fatigue of metallic materials
WITHDRAWN published on 1.1.1986
Selected format:Sheets and bands of precious metals and their alloys
WITHDRAWN published on 21.2.1983
Selected format:Specifications for the design of surge protection of industrial and civil electric system(Trial)
WITHDRAWN published on 7.11.1983
Selected format:-
WITHDRAWN published on 1.1.1984
Selected format:Latest update: 2026-04-15 (Number of items: 2 272 661)
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