Home / Standards / GB/T 13304.1-2008 GB/T 13304.1-2008 Active Steels classification - Part 1: Classification of according to chemical composition 钢分类 第1部分：按化学成分分类 Standard Type GBT ICS 77.140.01 CCS H40 Status 现行 Issue Date 2008-08-05 Implementation 2009-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会