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Standards GB - Chinese national standards - Page 6231
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 14999.1-1994
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Methods of acid etch test for longitudinal macro-structures of heat-resisting superalloy bars
WITHDRAWN published on 4.4.1994
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GB/T 14999.1-2012
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Test method for superalloys - Part 1: Verification of longitudinal macro-structures and defect by etch
WITHDRAWN published on 5.11.2012
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GB/T 14999.2-1994
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Methods of acid etch test for transvesemacro-structures of heat-resisting superalloys
WITHDRAWN published on 4.4.1994
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GB/T 14999.2-2012
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Test methods for superalloys - Part 2: Verification of transverse macro-structures and defect by etch
WITHDRAWN published on 5.11.2012
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GB/T 14999.3-1994
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Methods of longitudinal fracture test for heat-resisting superalloy bars
WITHDRAWN published on 4.4.1994
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GB/T 14999.3-2012
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Test methods for superalloys - Part 3: Verification of longitudinal fracture of bars
WITHDRAWN published on 5.11.2012
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GB/T 14999.4-1994
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Methods of examining micro-structures for heat-resisting superalloys
WITHDRAWN published on 4.4.1994
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GB/T 14999.4-2012
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Test methods for superalloys - Part 4: Determination of characterizing banding grains and primary carbides distribution of superalloy rollings
WITHDRAWN published on 5.11.2012
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GB/T 14999.5-1994
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Photomicrographs and photomacrographs for evaluating of heat-resisting superalloys
WITHDRAWN published on 4.4.1994
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GB/T 14999.6-2010
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Test methods for characterizing duplex grain sizes and primary carbides distribution of superalloy forgings
WITHDRAWN published on 23.12.2010
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