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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
Code for representing cast iron
WITHDRAWN published on 25.11.1985
Selected format:Code for representing cast iron
WITHDRAWN published on 3.3.2008
Selected format:Code for representing cast steels
WITHDRAWN published on 1.1.1985
Selected format:Code for representing cast steels
WITHDRAWN published on 10.5.1995
Selected format:The designationsdefinitions and symbols for heat treatment tempers of iron castings
WITHDRAWN published on 25.11.1985
Selected format:The designations, definitions and symbols for heat treatment tempers of steel castings
WITHDRAWN published on 25.11.1985
Selected format:Guidlines for application of conventional nondestructive testing methods
WITHDRAWN published on 25.11.1985
Selected format:Non-destructive testing—Guidelines for application
WITHDRAWN published on 25.12.2006
Selected format:Determination of effective depth of hardening after induction or flame hardening of steel
WITHDRAWN published on 21.7.2005
Selected format:Wire type image quality indicator
WITHDRAWN published on 1.1.1985
Selected format:Latest update: 2026-06-11 (Number of items: 2 281 927)
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