AISI 4340 / 34CrNiMo6
AISI 4340EN 34CrNiMo6 / 1.6582
Nickel-chromium-molybdenum steel with very high hardenability and toughness in heavy sections, chosen for the most highly stressed machined components.
- Exceptional toughness in heavy sections
- Very high hardenability
Available forms & sizes
| Form | Size range |
|---|---|
| Round Bars | 20 - 1000 mm dia, forged |
| Blocks & Profiles | Forged blocks and discs |
Chemical composition (%)
| Element | Min | Max |
|---|---|---|
| C | 0.38 | 0.43 |
| Ni | 1.65 | 2.00 |
| Cr | 0.70 | 0.90 |
| Mo | 0.20 | 0.30 |
Mechanical properties
| Property | Value | Unit |
|---|---|---|
| Yield Strength (Q+T) | 860 min | MPa |
| Tensile Strength (Q+T) | 1000 - 1200 | MPa |
| Elongation | 10 min | % |
Physical properties
| Property | Value | Unit |
|---|---|---|
| Density | 7.85 | g/cm3 |
Typical applications
Heavy duty gears and pinions
Aircraft landing gear components
Crankshafts
High stress fasteners
