Hot Rolled SCM420/SCM420h/SCM421Alloy Steel Round Bar
Surface Treatment: painting,plating,polishing,black oxide,transparent anti-rust oil
Heat treatment: Normalized / Annealed / Quenched / tempered
Application:
Carbon Steel |
Mold bottom Plastic mold Construction machinery parts Automobile parts Security grills Screens Construction |
Bearing Steel |
Aerospace Navigation Nuclear energy Chemical industry Electronic information Petrochemical Instrument and meter Transportation |
Cr-Mo Steel |
Mechanism & Fasteners gear Stressed components for vehicles Engines and machines Parts of larger cross-section |
Gear Steel |
All kinds of gears Statically and dynamically stressed component for vehicles Engines and machine Larger cross-section parts Crankshafts |
Chemical Element for JIS SCM440 round alloy steel bar
| Standard | Grade Number | |||||||||
| GB | 42CrMo | C | Si | Mn | P | S | Cr | Ni | Mo | Cu |
| ASTM | 4140 | 0.36-0.44 | 0.10-0.40 | 0.65-1.10 | ≤0.04 | ≤0.04 | 0.75-1.20 | - | 0.15-0.35 | ≤0.030 |
| DIN | 42CrMo4 1.7225 | 0.35-0.44 | 0.15-0.30 | 0.70-0.90 | ≤0.035 | ≤0.04 | 0.80-1.10 | - | 0.15-0.25 | ≤0.025 |
| JIS | SCM440 | 0.38-0.42 | 0.15-0.35 | 0.60-0.85 | ≤0.03 | ≤0.03 | 0.9-1.20 | ≤0.25 | 0.15-0.30 | ≤0.30 |

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