Stress relieving improves the spring quality and gives them durable capabilities. This process reduces the risk of failure or breakages over time to guarantee your mechanisms and machines reliable. The shape of a spring can change during the stress relieving process, such as outer diameter and overall length. Tempering is a form of treatment that can be used after quenching, which reheats the quenched material to a lower temperature, improving strength and hardness.  Stress relieving can increase the strength and durability of the spring, so that it is less likely that the springs will need replacing.