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%