4340 (34CrNiMo6)
It is a chrome-nickel-molybdenum alloyed tempering steel. It is supplied in two different conditions: heat-treated (28-32 HRC) and non-heat-treated (~240 HBW). In applications where the toughness of the 4140 material is insufficient and fracture resistance is important, it should be preferred over 4140. When hardened, it displays a higher lifespan than 4140 due to its high strength and especially high toughness. It is also a material suitable for surface hardening processes. Its usage hardness is approximately 50-55 HRC.
| C | Si | Mn | P Max | S | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|
| 0,30 - 0,38 | 0,15 - 0,40 | 0,30 - 0,60 | 0,035 | 0,035 | 1,80 - 2,20 | 0,15 - 0,30 | 1,40 - 1,70 |
STANDARD EQUIVALENTS OF THE MATERIAL
| DIN | AISI | EN |
|---|---|---|
| 1.6582 | 4340 | 34CrNiMo6 |
APPLICATION AREAS
- Crankshaft, crank arms, axle shaft
- Gear wheel and machine equipment
- Automobile parts
- Weapon parts
- Mold billets
- Non-high quantity plastic molds
