Have to disagree. My Business partner built Farm Machinery for 3 years, Mild Steel to SS, MIG everyday, none of it cracks, Weld Temp and Wire Feeder is critical.

 

 

Whatever Engloid said- x2


Mr. 7 posts ought to come with proof if he wants to make claims about cracking.

 

When I was welding up my exhaust that had stainless in it and the tubing was just mild I the bead just melted into the stainless like butter while it took a little longer for it to do it with the mild. It welded alot nicer too and I was just using just normal fluxcore for mild steel and I got less splatter and just nicer beads.

 

i have had no problems welding mild to stainless with my mig. whenever i weld anything to stainless i prefer to use 309 ss wire and a tri mix gas ( 90% Helium-7.5% Argon-2.5% Carbon Dioxide) it has worked wonders for me so you should have no problems either, if you lack the confidence just go for it and you will see its not a big deal lol thats what i did and now im very confident mig'ing stainless :P

 

---- all that. whip out the flux welder :P

 

Ha ha ha...nah i just wasn't sure because I never welded dissimilar metals before and i know i read about possible problems...but i figured HMT guys new the truther since i've seen HF manis with steel ext gates welded to them

 

Hell...steel is steel to me. It's either rusty or not rusty. I'll weld anything together if it's steel since all I have is hardcore OG fluxcore. I even got curious and desperate and tried AL and learned from that. It does make a cool popping sound though.

 

I welded my bov flange to a piece of chromoly and that went fine....just used the shitty harbor freight welder and 75/25 mix gas.....welded that ---- no problem...