Our 4340 duplex sprocket forgings are widely used in mining industry, marine industry, heavy machinery industry etc. 4340 forgings are a medium carbon nickel chromium molybdenum alloy steel forgings with excellent tensile strength, toughness, and fatigue resistance.
4340 alloy steel forgings chemical composition (%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
|
AISI 4340 |
0.37-0.43 |
0.15 – 0.30 |
0.60-0.80 |
≤0.035 |
≤0.040 |
0.70-0.90 |
0.20-0.30 |
