Home / Standards / GB/T 224-2019 GB/T 224-2019 Active Determination of the depth of decarburization of steels 钢的脱碳层深度测定法 Standard Type GBT ICS 77.040.99 CCS H24 Status 现行 Issue Date 2019-06-04 Implementation 2020-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A