Home / Standards / GB/T 40316-2021 GB/T 40316-2021 Active Welded high strength shaped and round steel tubes for automobile structure 汽车结构用高强度异型及圆形焊接钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A