Home / Standards / GB/T 4162-2022 GB/T 4162-2022 Active Method for ultrasonic testing of forged and rolled steel bars 锻轧钢棒超声检测方法 Standard Type GBT ICS 77.040.20 CCS H26 Status 现行 Issue Date 2022-04-15 Implementation 2022-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A