This document specifies the ordering content, classification, size, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of carburized gear steel for automobiles. This document applies to hot-rolled or hot-forged steel bars with a nominal diameter not larger than 180 mm.
YB/T 4984-2022 history
2022YB/T 4984-2022 Carburized gear steel for automobiles