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See Chinese contents: GB/T 37464-2019 GB/T 37464-2019: Hardening and tempering of heavy steel forgings
This Standard specifies the technical requirements and methods (including workpieces to be processed, heat treatment equipment, heat treatment process, heat treatment quality and inspection, shape correction, safety and hygiene requirements, energy consumption requirements and product report) for hardening and tempering of heavy steel forgings. This Standard is applicable to integral hardening and tempering of heavy steel forgings for heavy equipment in industries like energy, metallurgy and transportation, etc. This Standard is not applicable to surface hardening.
