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SEP 1921 (1984) — Ultrasonic Testing Standard for Steel / 德国钢铁商会超声波检测标准
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GB 5168-85: α-β Titanium Alloys — Examination of Structure (Chinese National Standard)
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GB/T 13305-2008 — Micrographic Method for Determining Area Content of α-Phases in Stainless Steels (English Translation)
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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 […]