4140 Steel
Standards
| Mat. No. | DIN | EN | AISI/SAE |
| 1.7225 | – | 42CrMo4 | 4140 |
Typical Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.41 | 0.30 | 0.78 | 1.05 | 0.20 | – | – | – | – |
Description
Special structural steel.
Applications
High and moderately stressed components for auto industry and mechanical engineering – shafts, connecting rods, crankshafts, screws, etc.
Physical properties (average values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210 Density [g/cm3]: 7.80
Soft Annealing
Heat to 680-720℃, cool slowly in furnace. This will produce a maximum Brinell hardness of 241.
Normalizing
Temperature: 840-880℃.
Hardening
Harden from a temperature of 820-860℃ followed by oil or water quenching.
Tempering
Tempering temperature: 540-680℃.
Disclaimer: the information and data presented herein are typical values for reference and are not intended as warranties to readers.
