4340 forging is used in most industry sectors for applications requiring higher tensile/yield strength than 4140 forging can provide. Typical applications are: heavy duty shafts, gears, axles, spindles, couplings, pins etc.
4340 forging is a 1.8% nickel – chromium – molybdenum high hardenability high tensile steel forging. 4340 forging generally supplied in the tensile range of 930 – 1080 MPa (condition U) – (Rc 28 – 36). 4340 forging has high strength and toughness in relatively large sections
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
|---|---|---|---|---|---|---|---|---|
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