Home / Standards / GB/T 21143-2025 GB/T 21143-2025 Active Metallic materials—Unified method of test for determination of quasistatic fracture toughness 金属材料 准静态断裂韧度的统一试验方法 Standard Type GBT ICS 77.040.10 CCS H22 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