About Chrome-moly Steel
Predator Axles are constructed with 4340 chrome-moly steel alloy material. Chrome-moly is an extremely strong alloy that is used in aircraft construction. This alloy safely allows much higher torque than stock steel rods.
| 4340 (Chrome moly) Normalized Alloy Steel | ||
|---|---|---|
| Minimum Properties | ||
| Ultimate Tensile Strength, psi | 186,000 | |
| Yield Strength, psi | 125,000 | |
| Elongation | 12.2% | |
| Rockwell Hardness | B100 | |
| Chemistry | ||
| Iron (Fe) | 96% | |
| Carbon (C) | 0.37 - 0.43% | |
| Chromium (Cr) | 0.7 - 0.9% | |
| Manganese (Mn) | 0.7% max | |
| Molybdenum (Mo) | 0.2 - 0.3% max | |
| Nickel (Ni) | 1.83% | |
| Phosphorus (P) | 0.035% max | |
| Sulphur (S) | 0.04% max | |
| Silicon (Si) | 0.23% | |