*GB/T 223.5-1997 Methods for chemical analysis of iron,steel and alloy The reduced molybdosilicate spectrophotometric method for the determination of acid-soluble silicon 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 223.12-1991 Methods for chemical analysis of iron, steel and alloy The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium 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 223.17-1989 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane 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 223.53-1987 Methods for chemical analysis of iron, steel and alloy. The flame atomic absorption spectrophotometric method for the determination of copper 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 223.63-1988 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese 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 223.68-1997 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 223.71-1997 Methods for chemical analysis of iron,steel and alloy The gravimetric 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 228-1987
*GB/T 230-1991 Metallic materials－Rockwell hardness test
*GB/T 231-1984 Metallic materials--Brinell hardness test
*GB/T 233-2000 Metallic materials-Forging test
*GB/T 702-1986 Hot-rolled round and square steels; Dimension,shape,weight and tolerance
*GB/T 1979-1980 Diagram of a low magnification texture blemish grading of structural steel
*GB/T 2101-1989 General requirements of acceptance,packaging,marking,and certification for section steel
*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 10561-1989 Steel-Determination of content of non-metallic inclusion-Micrographic method using standard diagrams
*GB/T 14981-1994 Dimenisions shape weight and tolerances for hot-rolled wire rods

*GB/T 6478-2001 Steels for cold heading and cold extruding
*GB/T 6478-2001 Steels for cold heading and cold extruding
*GB/T 6478-2001 Steels for cold heading and cold extruding