Tempering is usually done after quenching, it involves re-heating of the steel in order to reduce the hardness of the quenched steel and improve the ductility, toughness and strength of the spring. Tempering is usually done hand in hand with quenching and is usually a tradeoff between hardness and toughness/strength of steel. This research is aimed at evaluating the effect of normalizing, hardening and tempering on the impact toughness, hardness and tensile strength of springs.