Home / Standards / GB/T 1299-2025 GB/T 1299-2025 Active Tool and mould steels 工模具钢 Standard Type GBT ICS 77.140.35 CCS H40 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