Home / Standards / GB/T 6402-2024 GB/T 6402-2024 Active Method for ultrasonic testing of steel forgings 钢锻件超声检测方法 Standard Type GBT ICS 77.040.20 CCS H26 Status 现行 Issue Date 2024-09-29 Implementation 2025-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A