The welding supply guys will tell you no you cant do it. Or mine always did.
But honestly I have ran out of gas and grabbed the bottle off our "steel mig" and used it for stainless on the MIG and the TIG.
I did not have any problems at all. Was there any? I dunno. I am sure an expert could argue it as my welding salesman always did.
But it looked great and we had no structural problems that I am aware of.