Home / Standards / GB/T 4009-2008 GB/T 4009-2008 Active Chromium silicon 硅铬合金 Standard Type GBT ICS 77.100 CCS H42 Status 现行 Issue Date 2008-08-05 Implementation 2009-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A