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See Chinese contents: GB/T 6478-2015 GB/T 6478-2015: Steels for cold heading and cold extruding
This Standard specifies the classification, grade, ordering contents, dimension, appearance, weight and allowable deviation, technical requirements, test methods, inspection rules, package, mark, and quality certificate, etc. for the non-alloyed steels and alloyed structural steels for cold heading and cold extruding.
