Equivalent Materials
International equivalents for 42CrMo include:
- American standard: 4140 or G41400
- German standard: 42CrMo4 or 1.7225
- Japanese standard: SCM440
| No. | Grade | EN 10083-3: 2006 | ASTM A29/A29M-2012 | JIS G 4053-2008 |
|---|---|---|---|---|
| 41 | 42CrMo | 42 CrMo4 | 4140, 4142 | SCM440 |
Characteristics
The alloy demonstrates high fatigue strength, impressive hardenability, and excellent thermal resistance. Heat treatment through quenching and tempering refines the microstructure, enhancing mechanical properties and stress resistance.
Uses
42CrMo4 is extensively utilized in manufacturing gears, axles, shafts, and machine components. The material's advantages include:
- Remarkable heat treatment properties enhancing hardness and strength
- Exceptional machining properties for ease of production
- Outstanding welding properties ensuring strong, durable joints
Mechanical Properties
| Group | No. | Grade | Specimen Size (mm) | Quench Temp (C) | Quench Coolant | Temper Temp (C) | Tensile Strength Rm (MPa) | Yield Point Relb (MPa) | Elongation A (%) | Section Shrinkage Z (%) | Impact Energy ku2d (J) | Hardness HBW |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CrMo | 41 | 42CrMo | 25 | 850 | Oil | 560, Water/oil | 1080 | 930 | 12 | 45 | 63 | 229 |
Chemical Composition
| Group | No. | Grade | C | Si | Mn | Cr | Mo | Ni | W | B | Al | Ti | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CrMo | 41 | 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 | - | - | - | - | - | - |
Elements like chromium and molybdenum enhance hardenability, while carbon influences strength and hardness. Impurities such as sulfur and phosphorus can negatively affect steel quality and production processes.
