Home / Standards / GB/T 3207-2025 GB/T 3207-2025 Active Bright steel 银亮钢 Standard Type GBT ICS 77.140.60 CCS H44 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A