Stress Relief Material

For many alloy steels little or no stress relief occurs at temperatures less than approximately 500 f 260 c while approximately 90 of the stress is relieved by 1000 f 540 c.

Stress relief material.

Sub critical annealing soak temperature 1350 1450. We recommend this for lower carbon materials such as a36 a572 gr50 a709 1020 steel hot roll steel plates and fabrications. If shot blasting is done after stress relieving this operation does impart compressive stresses at the surface of the material and can cause distortion. For steel stress relief to be done properly exact heating and cooling rates need to be used.

Steel stress relief executed properly. The stress relief process is performed by heating in an oven as seen in figure 1 or furnace to a temperature for steel wire below the lower critical temperature ac 1 and holding at that temperature. Stress relief is a process in which a material is heated to a specific temperature for a specific amount of time to reduce the internal forces acting on the material. Using modern temperature controlling equipment the experts at hi tech steel are able to generate the very specific heating and cooling rates required to relieve and minimize the introduction of new stress.

The material is then typically cooled at a slow controlled rate so as to avoid adding any other internal stresses to the material. Building stress relief into your daily routine and taking time to rest and recharge helps you keep going as a caregiver without burning out or harming your health. Cast materials with low ductility or with geometries that include stress risers can increase the probability of cracking during the heating portion of the stress relief cycle. The maximum temperature for stress relief is limited to 55 f 30 c below the tempering temperature used after quenching from the hardening process.