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Standards GB - Chinese national standards - Page 7770
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 4339-1999
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Testing method for thermal expansion characteristic parameters of metallic materials
WITHDRAWN published on 1.11.1999
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GB 4340-1984
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Metallic materials--Vickers hardness test
WITHDRAWN published on 1.1.1984
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GB/T 4340.1-1999
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Metallic materials—Vickers hardness test—Part 1:Test method
WITHDRAWN published on 11.11.1999
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GB/T 4340.1-2009
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Metallic materials—Vickers hardness test—Part 1:Test method
WITHDRAWN published on 25.6.2009
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GB/T 4340.2-1999
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Metallic vickers hardness test—Part 2:Verification of hardness testers
WITHDRAWN published on 10.10.1999
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GB/T 4340.2-2012
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Metallic materials - Vickers hardness test - Part 2Verification and calibration of testing machines
WITHDRAWN published on 31.12.2012
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GB/T 4340.3-1999
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Metallic vickers hardness test—Part 3:Calibration of hardness reference blocks
WITHDRAWN published on 10.10.1999
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GB/T 4340.3-2012
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Metallic materials - Vickers hardness test - Part 3Calibration of reference blocks
WITHDRAWN published on 31.12.2012
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GB/T 4340.4-2009
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Metallic materials—Vickers hardness test—Part 4:Tables of hardness values
WITHDRAWN published on 25.6.2009
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GB/T 4341-1984
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Metallic materials--Shore hardness test
WITHDRAWN published on 1.1.1984
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