Home / Standards / GB/T 21143-2014 GB/T 21143-2014 Abolished 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 废止 Issue Date 2014-12-05 Implementation 2015-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A