GB/T 2518-2004 Continuous hot-dip zinc-coated steel sheets and strips

GB/T 2518-1988 Continual hot-dip zinc-coated steel sheets and strips

GB/T 2518-2008 Continuously hot-dip zinc-coated steel sheet and strip

GB/T 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis 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 232-1999 Metallic materials—Bend test GB/T 232-2010 Metallic materials—Bend test GB/T 232-2024 Metallic materials—Bend testing method GB/T 247-1997 General rule of acceptance, package, mark and certification for steel plates(sheets) and strips GB/T 247-2008 General rule of package,mark and certification for steel plates(sheets)and strips GB/T 708-1988 Dimensions shape weight and tolerances for cold-rolled plates and sheets GB/T 708-2006 Dimension,shape,weight and tolerance for cold-rolled steel plates and sheets GB/T 708-2019 Dimension,shape,weight and tolerance for cold-rolled steel strip and sheet GB/T 709-1988 Dimensions, shape, weight and tolerances for hot-rolled plates and sheets GB/T 709-2006 Dimension,shape,weight and tolerances for hot-rolled steel plates and sheets GB/T 709-2019 Dimension,shape,weight and tolerance for hot-rolled steel strip,plate and sheet GB/T 1839-2003 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products GB/T 1839-2008 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products GB/T 2975-1998 Steel and steel products—Location and preparation of test pieces for mechanical testing GB/T 2975-2018 Steel and steel products—Location and preparation of samples and test pieces for mechanical testing GB/T 4336-2002 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel(routine method) GB/T 4336-2016 Carbon and low-alloy steel—Determination of multi-element contents—Spark discharge atomic emission spectrometric method (routine method) GB/T 5027-1999 Metallic materials—Sheet and strip—Determination of plastic strain ratio(r-values) GB/T 5027-2007 Metallic materials—Sheet and strip—Determination of plastic strain ratio GB/T 5027-2016 Metallic materials—Sheet and strip—Determination of plastic strain ratio GB/T 5028-1999 Metallic materials—Sheet and strip—Determination of tensile strain hardening exponent(n-values) GB/T 5028-2008 Metallic materials—Sheet and strip—Determination of tensile strain hardening exponent 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 GB/T 17505-1998 Steel and steel products General technical delivery requirements GB/T 17505-2016 Steel and steel products—General technical delivery requirements GB/T 5027-2025 Metallic materials—Sheet and strip—Determination of plastic strain ratio(r) GB/T 5028-2025 Metallic materials—Sheet and strip—Determination of tensile strain hardening exponent(n) GB/T 247-2025 General rules of package, mark and certification for steel plate, sheet and strip GB/T 1839-2025 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products