Home / Standards / GB/T 8749-2021 GB/T 8749-2021 Active Hot-rolled quality carbon structural steel strip 优质碳素结构钢热轧钢带 Standard Type GBT ICS 77.140.50 CCS H46 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