Home / Standards / GB/T 45981.1-2025 GB/T 45981.1-2025 Active Heavy casting and forging for heavy-duty gas turbine—Part 1:Steel open die forgings 重型燃气轮机用大型铸锻件 第1部分:钢质自由锻件 Standard Type GBT ICS 77.140.85 CCS J32 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A