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Standards GB - Chinese national standards - Page 4992
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 5677-2018
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Castings—Radiographic testing
Standard published on 17.9.2018
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GB/T 5678-2013
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Sampling methods of spectrochemical analysis for cast alloys
Standard published on 9.6.2013
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GB/T 5680-2023
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Austenitic manganese steel castings
Standard published on 23.5.2023
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GB/T 5682-2015
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Ferroboron
Standard published on 11.9.2015
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GB/T 5683-2024
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Ferrochromium
Standard published on 25.4.2024
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GB/T 5686.1-2022
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Ferromanganeseferromanganese-siliconnitrogen-bearing ferromanganese and manganese metal—Determination of manganese content—Potentiometric method titrimetric method after ammonium nitrate oxidation and titrimetric method after perchloric acid oxidation
Standard published on 12.10.2022
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GB/T 5686.2-2022
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Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal—Determination of silicon content—Molybdenum blue spectrophotometric method, silicon potassium fluoride titrimetric method and perchloric acid dehydration gravimetric method
Standard published on 12.10.2022
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GB/T 5686.4-2022
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Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal—Determination of phosphorus content—Molybdenum blue spectrophotometric method and bismuth phosphomolybdate blue spectrophotometric method
Standard published on 12.10.2022
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GB/T 5686.5-2023
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Ferromanganese,ferromanganese-silicon,nitrogen-bearing ferromanganese and manganese metal—Determination of carbon content—The Infrared absorption method,the gasometric method,the gravimetric method and the coulometric method
Standard published on 27.11.2023
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GB/T 5686.7-2008
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Ferromanganese,ferromanganese-silicon,nitrogen-bearing ferromanganese and manganese metal—Determination of sulfur content—Infrared absorption method and combustion-neutralization method
Standard published on 13.5.2008
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