As pete points out, stainless with stainless when done up to a torqued can "seize " what we call "pick up". If your lucky you can get out of it , plenty of lubrication and winding backwards and forwards to avoid shearing. Then the threads need cutting if needing to use again. Stainless is very hard, gets harder with heat! Its tensile strength is poor, thus its tendency to shear. As pete suggests stick with standard for a long term solution.