Home / Standards / GB/T 11251 GB/T 11251 Active Alloy structural steel plate, sheet and strip 合金结构钢钢板和钢带 Standard Type GBT ICS 77.140.50 CCS H 46 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会