Home / Standards / GB/T 31922-2015 GB/T 31922-2015 Active Hot-rolled steel sheets and strips of higher yield strength with improved formability 改善成形性热轧高屈服强度钢板和钢带 Standard Type GBT ICS 77.140.50 CCS H46 Status 现行 Issue Date 2015-09-11 Implementation 2016-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会