Home / Standards / GB/T 9941-2009 GB/T 9941-2009 Abolished High speed tool steel sheets and plates 高速工具钢钢板 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