SCM415 

 SCM415 low-alloy steel heat-resistant steel that has high thermal strength and oxidation resistance, and good mechanical properties, alloy structural steel, boiler and steam turbine at 530 ℃ for the following on the high-pressure boiler superheater tubes, steam catheter and the corresponding forgings. Japan's new brand for the old number for the SCM21. Carburized completely within the outer diameter grinding, toughness, wear-resistant for its quality and stability: the cylinder piston. SCM415 chrome molybdenum distillation Jinjin Gang carburizing treatment, the surface hardness of HRC62- 64 degrees. Is pearlitic heat-resistant steel, high strength, lower toughness, higher endurance strength, workability and good cold-strain plasticity, weldability is acceptable in general normalizing and tempering conditions used. 
 SCM415 Alloy Steel 
 Chemical Composition: C :0.13-0 .18 Si :0.15-0 .35 Mn :0.60-0 .85 P: 0.03 The following S: 0.03 The following Cr :0.9-1 .2 Mo :0.15-0 .3 mechanical properties: tensile strength σb (MPa): ≥ 440 ( 45) yield strength σs (MPa): ≥ 295 (30) Elongation δ5 (%): ≥ 22, Reduction of ψ (%): ≥ 60 Impact energy Akv (J): ≥ 94 impact toughness αkv (J / cm2): ≥ 118 (12) Hardness: ≤ 179HB sample size: the sample blank standard size of 30mm heat treatment: quenching 900 ℃, air-cooled; tempering 650 ℃, air cooling. Microstructure: ferrite + pearlite + a small amount of bainite