4140 Steel
4140 Steel
4140 steel is an alloy steel with medium carbon. Often used in forging, but utilized in applications for automotive axels, shafts, and bolts as well. Hard material with a high impact resistance if heat treated.
| Hot Rolled | Carbon (C) | Manganese (Mn) | Phosphorous (P) | Sulfur (S) |
|---|---|---|---|---|
| 0.38 - 0.43 | 0.75 - 1.10 | 0.035 Max | 0.04 Max | |
| Silicon (Si) | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Other |
| 0.15 - 0.35 | -- | 0.80 - 1.10 | 0.15 - 0.25 | -- |
| Tensile Strength | Yield Strength | Elongation % | Reduction Area % | Hardness |
| 95 ksi | 60 ksi | 26% | 57% | 197 HBW |
Mechanical properties are displayed in the Annealed condition.