GB/T 32254-2015 Precision hot forging of straight bevel gear—General specifications

GB/T 11365-1989 Accuracy of bevel and hypoid gears GB/T 12362-2003 Tolerances and machining—Allowances of steel die forging GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 226-1991 Etch test for macrostructure and defect of steels GB/T 226-2015 Test method for macrostructure and defect of steel by etching 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 231.1-2002 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2009 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2018 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 2822-1981 Standard linear dimensions GB/T 2822-2005 Standard linear dimensions GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 3077-1999 Alloy structure steels GB/T 3077-2015 Alloy structure steels GB/T 5216-1985 Technical requirements for structural steel with specified hardenability bands GB/T 5216-2004 Structural steels subject to end-quench hardenability requirements GB/T 5216-2014 Structural steels with specified hardenability bands GB/T 6394-2002 Metal-methods for estimating the average grain size GB/T 6394-2017 Determination of estimating the average grain size of metal GB/T 1979-2001 Standard diagrams for macrostructure and defect of structural steels GB/T 1979-2025 Evaluation of macrostructural defects in structural steels—Acid etching method and ultrasonic testing method GB/T 191-2025 Graphical symbols marking for handling and storage of packages