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See Chinese contents: GB/T 27677-2017 GB/T 27677-2017: Aluminium hardeners
This Standard specifies the requirements, test methods, inspection rules, as well as marking, packaging, transportation, storage, quality certificate and order form (or contract) contents for aluminium hardeners. This Standard applies to aluminium hardeners for cast aluminium alloys and wrought aluminium alloys. This Standard does not apply to aluminium-titanium-boron, aluminium-titanium-carbon and aluminium-titanium alloy wires for cast aluminium alloys and wrought aluminium alloys.
