GB/T 4171-2000 Superior atmospheric corrosion resisting structural steel

GB 4171-1984

GB/T 4171-2008 Atmospheric corrosion resisting structural steel

GB/T 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223.3-1988 Methods for chemical analysis of iron, steel and alloy—The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.5-1997 Methods for chemical analysis of iron,steel and alloy—The reduced molybdosilicate spectro photometric 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 223.14-1989 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 223.19-1989 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 223.49-1994 Methods for chemical analysis of iron, steel and alloy—Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content GB/T 223.58-1987 Methods for chemical analysis of iron，steel and alloy--The extraction-absorption catalytic polarographic method for the determination of manganese 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 223.61-1988 Methods for chemical analysis of iron,steel and alloy—The ammonium phosphomolybdate volumetric method for the determination of phosphorus 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 forthe 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 223.72-1991 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 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 708-1988 Dimensions shape weight and tolerances for cold-rolled plates and sheets GB/T 709-1988 Dimensions, shape, weight and tolerances for hot-rolled plates and sheets 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 11253-1989 Cold-rolled plain carbon andlow alloy structural steel sheets and strips GB/T 17505-1998 Steel and steel products General technical delivery requirements