标签： 中国标准
GB 5168-85 α-β Titanium Alloys — Examination of Structure UDC 669.295:620.186 Chinese National Standard Issued: 1985-05-08 | Implemented: 1986-02-01 Approved by: State Bureau of Standards Scope This standard applies to the examination of macro and micro structure of α-β titanium alloys. It is not applicable to finished parts. 1. Macro Structure Examination 1.1 Specimen Preparation […]
GB 2971-82 – Method of Fracture Test for Carbon and Low Alloy Steels UDC: 669.14/.15 : 620.18 National Standard of the People’s Republic of China Promulgated: 1982-05-25 | Implemented: 1982-12-01 Scope This standard specifies the fracture test method applicable to carbon structural steels, low-alloy structural steel plates, bars, and sections. It may also be used […]