*GB/T 223.9-2000 Methods for chemical analysis of iron, steel and alloy－The chrom azurol S photometric method for the determination of aluminium content
*GB/T 223.10-2000 Methods for chemical analysis of iron, steel and alloy－The cupferron separation-chrome azurol S photometric method for the determination of aluminium content
*GB/T 223.11-1991 Methods for chemical analysis of iron,steel and alloy The ammonium persulfate oxidation volumetric method for the determination of chromium content
*GB/T 223.14-2000 Methods for chemical analysis of iron, steel and alloy－The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content
*GB/T 223.16-1991 Methods for chemical analysis of iron, steel and alloy The chromotropic acid photometric method for the determination of titanium content
*GB/T 223.18-1994 Methods for chemical analysis of iron, steel and alloy The sodium thiosulfate separation iodimetric method for the determination of copper content
*GB/T 223.19-1989 Methods for chemical analysis of iron, steel and alloy. The neocuproine-chloroform extraction photometric method for the determination of copper content
*GB/T 223.23-1994 Methods for chemical analysis of iron, steel and alloy.The dimethylglyoxime spectrophotometric method for the determination of nickel content
*GB/T 223.24-1994 Methods for chemical analysis of iron, steel and alloy.The extraction seperation-The dimethylglyoxime spectrophotometric method for the determination of nickel content
*GB/T 223.26-1989 Methods for chemical analysis of iron, steel and alloy--The thiocyanate direct photometric method for the determination of molybdenum content
*GB/T 223.27-1994 Methods for chemical analysis of iron,steel and alloy The thiocyanate-butyl acetate extraction spectrophotometric method for the determination of molybdenum content
*GB/T 223.39-1994 Methods for chemical analysis iron,steel and alloy The sulphochlorophenol S photometric method for the determination of niobium content
*GB/T 223.54-1987 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of nickel content
*GB/T 223.58-1987 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
*GB/T 223.59-1987 Methods for chemical analysis of iron, steel and alloy--The reduced molybdoantimonyl phosphoric acid photometric method for the determination of phosphorus content
*GB/T 223.60-1997 Methods for chemical analysis of iron,steel and alloy The perchloric acid dehydration gravimetric method for the determination of silicon content
*GB/T 223.64-1988 Methods for chemical analysis of iron, steel and alloy; The flame atomic absorption spectrometric method for the determination of manganese content
*GB/T 223.67-1989 Methods for chemical analysis of iron, steel and alloy--The reducing distillation-methylene blue photometric method for the determination of sulfur content
*GB/T 223.68-1997 Methods for chemical analysis of iron,steel and alloy The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
*GB/T 223.69-1997 Methods for chemical analysis of iron,steel and alloy The gas- volumetric method after combustion in the pipe furnace for the determination of carbon content
*GB/T 223.72-1991 Methods for chemical analysis of iron, steel and alloy The alumina chromatographic separation-barium sulfate gravimetric method for the determination of sulphur content
*GB/T 223.74-1997 Methods for chemical analysis of iron,steel and alloy The combustion gravimetric/gas-volumetric method for the determination of combined carbon content
*GB/T 223.75-1991 Methods for chemical analysis of iron, steel and alloy The methanol distillation-curcumin photometric method for the determination of boron content
*GB/T 223.76-1994 Methods for chemical analysis of iron, steel and alloy The flame atomic absorption spectrometric method for the determination of vanadium content
*GB/T 228-1987
*GB/T 229-1994 Metallic materials-Charpy notch impact test
*GB/T 232-1999 Metallic materials--Bend test
*GB/T 247-1997 General rule of acceptance,package,mark and certification for steel plates(sheets) and strips
*GB/T 2970-1991 Thicker steel plate—Method for ultrasonic inspection
*GB/T 2975-1998 Steel and steel products--Location and preparation of test pieces for mechanical testing
*GB/T 4336-1984 Method for photoelectric emission spectroscopic analysis of carbon steel medium and low alloy steel
*GB/T 5313-1985 Steel plate with through-thickness characteristics