Home / Standards / GB/T 38817-2020 GB/T 38817-2020 Active Steel for high heat input welding 大线能量焊接用钢 Standard Type GBT ICS 77.140.50 CCS H46 Status 现行 Issue Date 2020-06-02 Implementation 2021-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A