Home / Standards / GB/T 11251-2009 GB/T 11251-2009 Abolished Hot-rolled alloy structural steel plates 合金结构钢热轧厚钢板 Standard Type GBT ICS 77.140.50 CCS H46 Status 废止 Issue Date 2009-10-30 Implementation 2010-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会