Home / Standards / GB/T 28417-2012 GB/T 28417-2012 Abolished Carbon bearing steel 碳素轴承钢 Standard Type GBT ICS 77.140.20 CCS H40 Status 废止 Issue Date 2012-06-29 Implementation 2013-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会