HB 5142-1996 Metal material planar strain fracture toughness KIC test method

GB/T 12160-2002 Calibration of extensometers used in uniaxial testing GB/T 12160-2019 Metallic materials—Calibration of extensometers systems used in uniaxial testing GB/T 228-2002 Metallic materials—Tensile testing at ambient temperature GB/T 228.1-2010 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.2-2015 Metallic materials—Tensile testing—Part 2:Method of test at elevated temperature GB/T 228.3-2019 Metallic materials—Tensile testing—Part 3:Method of test at low temperature GB/T 228.4-2019 Metallic materials—Tensile testing—Part 4:Method of test in liquid helium GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values JJG 139-1999 Universal Tension and Compression Testing Machine JJG 139-2014 Tension,Compression and Universal Testing Machines