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See Chinese contents: GB/T 20887.1-2017 GB/T 20887.1-2017: Continuously hot rolled high strength steel sheet and strip for automobile -- Part 1: High yield strength steel for cold forming
This Part of GB/T 20887 specifies the classification and grade expression method, ordering contents, dimension, appearance, weight, technical requirements, test methods, inspection rules, package, mark and quality certificate of hot rolled high yield strength steel sheet and strip for cold forming.
