Iâ€™m trying to design a spring clip that will be used to force a heatsink down onto a PCB component. Iâ€™ve seen similar things made from 0.6mm thick stainless steel. Presumably Iâ€™d need to have the parts heat treated to ensure the finished part behaves like a spring (I.E. it must always want to revert back to its original shape and mustnâ€™t deform permanently). Two questions: 1) Is 0.6mm thick stainless steel a good choice? 2) What heat treatment should I specify? Any help would be gratefully appreciated.