Home / Standards / GB/T 4008-2024 GB/T 4008-2024 Active Ferromanganese-silicon 锰硅合金 Standard Type GBT ICS 77.100 CCS H42 Status 现行 Issue Date 2024-06-29 Implementation 2025-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A