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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
Magnesium alloy extruded bars
WITHDRAWN published on 27.11.2013
Selected format:Magnesium alloy extruded profiles
WITHDRAWN published on 8.5.1985
Selected format:Magnesium alloy extruded profiles
WITHDRAWN published on 3.11.2003
Selected format:Magnesium alloy extruded profiles
WITHDRAWN published on 27.11.2013
Selected format:Metallic powders--Determination of particle size distribution by method of sedimentation balance
WITHDRAWN published on 8.5.1985
Selected format:-
WITHDRAWN published on 1.1.1985
Selected format:Metallic powders—Determination of loss of mass on hydrogen reduction (hydrogen loss)
WITHDRAWN published on 4.3.1999
Selected format:Metallic powders—Determination of total oxygen content by reduction-extraction
WITHDRAWN published on 10.7.2001
Selected format:Metallic powders, excluding powders for hardmetals—Determination of dimensional changes associated with compacting and sintering
WITHDRAWN published on 8.5.1985
Selected format:Metallic powdersexcluding powders for hardmetals—Determination of dimensional changes associated with compacting and sintering
WITHDRAWN published on 11.9.2015
Selected format:Latest update: 2026-06-14 (Number of items: 2 282 206)
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