Home / Standards / GB/T 38338-2019 GB/T 38338-2019 Active Test method for fracture toughness of carbon materials 炭素材料断裂韧性测定方法 Standard Type GBT ICS 29.050 CCS Q51 Status 现行 Issue Date 2019-12-10 Implementation 2020-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A