SCM420 has excellent hardenability and weldability, good machinability and cold strain plasticity, no temper brittleness and little cold crack tendency. This steel is suitable for carburizing heat treatment, generally in the quench condition of quench or carburizing, used in the manufacture of non-corrosive medium and working temperature below 250℃ of high pressure pipe and various fasteners for manufacturing cars, aircraft all kinds of special wear resistant parts, advanced carburizing parts, such as gear, shaft.
Standard: JIS G4053
Size: φ15 - 200mm
Forms: Round bar
Delivery Condition: Cold drawing, hot rolling, forging
The Equivalent Standards:
EN | ISO | AISI | DIN | GB |
25CrMo4 | 42CrMo4 | 4130 | 25CrMo4 | 30CrMn |
Chemical composition (JIS G4053)
C | Si | Mn | Ni | Cr | Mo | P | S |
0.18-0.23 | 0.15-0.35 | 0.6-0.85 | ≦0.25 | 0.9-1.2 | 0.15-0.30 | ≦0.03 | ≦0.03 |
The Mechanical Properties
Tensile Strength (kgf/mm²) | Yield Strength 0.2% (MPa) | Elongation -% in 50 mm (min.) | Hardness, HB |
≥885(90) | ≥685(70) | 12 | ≤197HB |
Heat treatment
Annealing: 850℃ furnace cold
• Normalization: air cooling at room temperature of 850~900℃
• Quenching: 850~900℃ first oil cooling, 800~850℃ second oil cooling
• Tempering: air cooling at room temperature of 150~200℃
World iron&steel is a professional supplier of alloy steel rods and bars. We manufacture and distribute high quality steel SCM420 round bar for gear application in accordance with JIS G4053 standards, specified delivery conditions and final customer specifications for industrial and commercial applications. Special sizes of steel bars and delivery issues can be further negotiated and we provide a wide range of solutions for purchasing departments to select alternative grades, contact us today!
