Nut welding is performed every day to bare steel, galvanized, stainless and other materials.. Basic data is available to give one starting points to begin. Published data for MFDC is not readily available but will be similar. Welds will happen in in much shorter times equal faster. Start at lower weld times and work up is the rule for all new set ups.
There is another article in this blog which describes the many variables to consider for a proper weld schedule to nut weld stainless steel. Start with this and you will be guided to other references which can help you develop a good process.
HOW DO YOU DEVELOP A PROCESS TO PROJECTION WELD STAINLESS STEEL?
THREE PROJECTION WELD NUT
Reference: AWS C1.1 Recommended Practices for Resistance Welding
AWS J1.3 Specification for Materials Used In Resistance Welding Electrodes and Tooling
AWS J1.2 Guide to Installation and Maintenance of Resistance Welding Machines
Photos courtesy of T.J. Snow Co. and Tuffaloy Products Inc.