Our large forged shafts 4340 shaft forgings have high strength, high ductility, high toughness, high creep resistance, and high fatigue resistance. They are suitable for high loads heavy machinery shafts, turbine shafts with a diameter greater than 250mm, helicopter rotor shafts, high-load transmission parts, gear shafts, etc.
These large forged shafts 4340 shaft forgings are delivered in a rough turning and quenching & tempering state. The large forged shafts 4340 shaft forgings we provide have a reasonable machining allowance. The customer’s machining cost is greatly reduced, and the subsequent machining time is reduced. We can also add semi-fine turning or fine turning after tempering according to customer requirements.
After quenching and tempering, large forged shafts 4340 shaft forgings can commonly have yield strengths of 740-1860 MPa, tensile strengths of 860-1980 MPa, elongations of 11-23%.
| Steel Grade | C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
|
AISI 4140 |
0.380 – 0.430 |
0.15 – 0.30 |
0.75 – 1.0 |
≤0.035 |
≤0.040 |
0.80 – 1.10 |
0.15 – 0.25 |
After quenching and tempering, large forged shafts 4340 shaft forgings can commonly have yield strengths of 740-1860 MPa, tensile strengths of 860-1980 MPa, elongations of 11-23%.
The strength of 4140 steel forgings belongs to high-strength alloy steel forgings, with high yield strength and high tensile strength.
After quenching, 4140 steel has good hardenability and can meet the requirements of cooling rate.
4140 steel forgings have good toughness, can withstand large impact loads, and are not prone to cracks.
4140 steel forgings have little deformation during the quenching process and can be used to manufacture parts requiring high dimensional accuracy.
4140 steel forgings have good strength and endurance performance at high temperatures.
Our steel forgings are widely used in wind power industry, chemical industry, machinery industry, automotive industry, marine industry, power plant industry, metallurgy industry, mining industry, petrochemical industry and other industries.
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