Home / Standards / GB/T 30834-2022 GB/T 30834-2022 Active Rating and classifying of inclusions in steel—Scanning electron microscope method 钢中非金属夹杂物的评定和统计 扫描电镜法 Standard Type GBT ICS 77.040.99 CCS H24 Status 现行 Issue Date 2022-10-14 Implementation 2023-02-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A