GB/T 5218-1999 Alloy spring steel wires

GB 5218-1985 GB 5219-1985 GB 5221-1985

YB/T 5318-2006 Alloy spring steel wires

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 223.18-1994 Methods for chemical analysis of iron, steel and alloy The sodium thiosulfate separation iodimetric method for the determination of cupper 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 223.53-1987 Methods for chemical analysis of iron，steel and alloy--The flame atomic absorption spectrophotometric method for the determination of copper content GB/T 223.54-1987 Methods for chemical analysis of iron,steel and alloy—The flame atomic absorption spectrophotometric method for the determination of nickel content GB/T 223.63-1988 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 223.71-1997 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 224-1987 Determination of depth of decarburization of steel GB/T 228-1987 GB/T 231-1984 GB/T 342-1997 Dimension shape mass and tolerance for cold-drawn round square and hexagonal steel wires GB/T 2103-1988 General provisions for checking, packing, marking and quality certification of steel wire GB 2976-1988 Metallic materials—Wire—Wrapping test GB/T 3207-1988 Bright steel GB/T 4336-1984 GB/T 10561-1989 Steel—Determination of content of non-metallic inclusion—Micrographic method using standard diagrams GB/T 13302-1991 Steel—Determination of area content of graphite-micrographic method using diagrams

ASTM A231/A231M:1991 ASTM A401/401M