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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
Ferroboron
WITHDRAWN published on 1.1.1987
Selected format:Ferroboron
WITHDRAWN published on 10.10.1995
Selected format:Ferrochromium
WITHDRAWN published on 22.8.1987
Selected format:Ferrochromium
WITHDRAWN published on 5.8.2008
Selected format:Vacuum extra low carbon ferrochromium
WITHDRAWN published on 22.7.1987
Selected format:Nitrogen-bearing ferro-chromium
WITHDRAWN published on 1.1.1985
Selected format:Methods for chemical analysisof silicomanganese alloy--The potentiometric titration method for the determination of manganese content
WITHDRAWN published on 20.9.1988
Selected format:Ferromanganese,ferromanganese-silicon,nitrogen-bearing ferromanganese and manganese metal—Determination of manganese content—Potentiometric method and titrimetric mothod after ammonium nitrate & perchloric acid oxidation
WITHDRAWN published on 13.5.2008
Selected format:Methods for chemical analysis of silicomanganese alloy—The gravimetric method for the determination of silicon content
WITHDRAWN published on 4.12.1985
Selected format:Ferromanganese,ferromanganese-silicon,nitrogen-bearing ferromanganese and manganese metal—Determination of silicon content—Molybdenum blue photometric method,silicon potassium fluoride titrimetric method and perchloric acid dehydration gravimetric method
WITHDRAWN published on 13.5.2008
Selected format:Latest update: 2026-06-11 (Number of items: 2 281 927)
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