you need to tig it with back gassing and 304 rod. 90/10 or 98/2 is good, but the 75/25 will embrittle the weld and allow martisite formation every time... Look it up in the J. F. Lincoln Arc Welding Procedure Manual and follow the procedure if you want a sanitary weld. Sorry
Wheelchair Bob (Retired Welder)
100% Argon is used when tig welding stainless, and 308L rod is used to weld 304.
For now I got a weldless fitting for it since its just the HLT. Once I get the proper gas I'll give it another go. Really just want to see if I can make it work with a MIG welder if at all possible since its what I have.