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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
Methods for chemical analysis of ferrosilicon--The chromazurol S photometric method for the determination ofaluminium content
WITHDRAWN published on 20.9.1988
Selected format:Methods for chemical analysis of ferrosilicon--The EDTA volumetric method for the determination of aluminum content
WITHDRAWN published on 1.1.1984
Selected format:Methods for chemical analysis of ferrosilicon-the EDTA volumetric method for the determination of aluminium content
WITHDRAWN published on 11.11.1997
Selected format:Methods for chemical analysis of ferrosilicon. The diphenylcarbazide photometric method for the determination of chromium content
WITHDRAWN published on 20.9.1988
Selected format:Methods for chemical analysis of ferrosilicon. The chromatographic separation-barium sulfate gravimetric method for the determination of sulfur content
WITHDRAWN published on 9.4.1984
Selected format:Methods for chemical analysis of ferrosilicon. The atomic absorption spectrometric method for the determination of calcium content
WITHDRAWN published on 20.9.1988
Selected format:Methods for chemical analysis of ferrosilicon The flame atomic absorption spectrometric method for the determination of aluminium content
WITHDRAWN published on 30.12.1988
Selected format:Corrosion of metals and alloys—Test methods for intergranular corrosion of stainless steels
WITHDRAWN published on 10.10.2008
Selected format:Method of 10 per cent oxalic acid etch test for stainless steels
WITHDRAWN published on 25.10.2000
Selected format:Method of ferric sulfate-sulfuric acid test for stainless steels
WITHDRAWN published on 25.10.2000
Selected format:Latest update: 2025-11-03 (Number of items: 2 242 248)
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