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Standards GB - Chinese national standards - Page 8990
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
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GB/T 9447-1988
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Test method for fatigue crack growth rates of welded joints
WITHDRAWN published on 25.6.1988
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GB 9449-1988
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Testing method for cooling properties of quenching media
WITHDRAWN published on 1.1.1988
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GB/T 945-1976
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Screwscross recessedthin raised cheese head
WITHDRAWN published on 13.10.1976
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GB/T 9450-1988
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Determination and verification of the effective depth of carburizod and hardened cases of steel parts
WITHDRAWN published on 25.6.1988
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GB/T 9450-2005
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Steels-Determination and verification of the depth of carburized and hardened cases
WITHDRAWN published on 21.7.2005
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GB/T 9451-1988
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Determination of total or effective thickness of thin surface hardened layers of steel parts
WITHDRAWN published on 24.6.1988
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GB/T 9452-1988
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Testing method for working zone of heat treating furnace
WITHDRAWN published on 25.6.1988
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GB/T 9452-2003
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Testing method for work zone of Heat treatment furnace
WITHDRAWN published on 25.11.2003
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GB/T 9452-2012
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Testing method for working zone of heat treatment furnace
WITHDRAWN published on 3.9.2012
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GB/T 9453-1988
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Terminology of forging dies and elements
WITHDRAWN published on 24.6.1988
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