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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
Method of 65 percent nitric acid test for stainless steels
WITHDRAWN published on 25.10.2000
Selected format:Method of nitric-hydrofluoric acid test for stainless steels
WITHDRAWN published on 25.10.2000
Selected format:Stainless steels--Method of copper sulphate-Sulphuric acid corrosion test
WITHDRAWN published on 1.1.1990
Selected format:Method of copper sulfate-sulfuric acid test for stainless steels
WITHDRAWN published on 25.10.2000
Selected format:Method of 5 per cent sulfuric acid test for stainless steels
WITHDRAWN published on 25.10.2000
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WITHDRAWN published on 1.1.1984
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WITHDRAWN published on 1.1.1984
Selected format:-
WITHDRAWN published on 1.1.1984
Selected format:Cold rolled low-carbon steel sheet—Ferrite grain size—Test methods
WITHDRAWN published on 9.4.1984
Selected format:Method for photoelectric emission spectroscopic analysis of carbon steel,medium and low alloy steel
WITHDRAWN published on 9.4.1984
Selected format:Latest update: 2025-10-19 (Number of items: 2 239 213)
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