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Standards GB - Chinese national standards - Page 274
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 13302-1991E
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Steel—Determination of area content of graphite-micrographic method using diagrams
Standard published on 13.12.1991
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GB/T 13303-1991
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Steels--Determination method of oxidation resistance
Standard published on 13.12.1991
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GB/T 13304.1-2008
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Steels classification - Part 1: Classification of according to chemical composition
Standard published on 5.8.2008
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GB/T 13304.2-2008
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Steels classification - Part 2: Classification of according to main quality classes and main property or application characteristics
Standard published on 5.8.2008
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GB/T 13305-2024
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Method for determining content of the -phase in stainless steels
Standard published on 28.5.2024
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GB/T 13306-2011
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Plates
Standard published on 12.5.2011
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GB/T 13307-2012
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Industrial pre-crimped wire square opening screens
Standard published on 3.9.2012
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GB/T 13309-2007
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Specification for mechanical vibration generator systems
Standard published on 11.10.2007
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GB/T 13310-2007
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Electrodynamic vibration generator systems
Standard published on 11.10.2007
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GB/T 13313-2008
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Methods of shore and leeb hardness testing for rolls
Standard published on 11.9.2008
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