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See Chinese contents: GB/T 4295-2019 GB/T 4295-2019: Tungsten carbide powder
This Standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificates and purchase orders (or contracts) for tungsten carbide powder. This Standard applies to tungsten carbide powder with an average particle size no less than 0.6¦Ìm for the production of cemented carbide and other powder metallurgy products.
