Hi, I don't know the answer to your question, but you should check out the web page (link below) at the University of Cambridge in the UK which gives answers to most of the questions that I have on welding of steels and other stuff.
If any part of stainless-steel is heated in the range 500 degrees to 800 degrees for any reasonable time there is a risk that the chrome will form chrome carbides (a compound formed with carbon) with any carbon present in the steel. This reduces the chrome available to provide the passive film necessary for corrosion resistance.
With modern low carbon grade stainless steels it is probably unlikely, unless seriously overheated for prolonged periods.
Small quantities of either titanium (321) or niobium (347) added to stabilise the material will inhibit the formation of chrome carbides.
