Low temperature liquid nitriding is performed in a carbon and nitrogen fused salt bath as a single step hardening process. The two hour heat treatment produces substantial endurance and wear properties. Future planing for small size vehicles in the automotive industry includes low temperature liquid nitriding applications. Crankshafts, rocker arms, rocker arm shafts, camshafts, differential housings and gears all benefit from this specialized heat treatment. Cost advantages may be realized by low temperatre liquid nitriding of carbon steel as a substitute for alloy steels.