Hi all.
I just bought a tank with a cga 360 valve on it. I had it filled and noticed that it's for CO2 only. I have an adapter for my regulator (cga 580 fitting) to use the tank.

How terrible will it be MIG welding mild steel with 100% CO2, i.e. no argon? I have .030" ER-70S6 wire. I'm just looking to learn. Anyone have any recommendations? Should I swap to a CO2 and argon tank (cga 580?) or try a different electrode wire?
Thanks,
Sean

 

lot of people use straight CO2 every day got it. it isn't a real problem at all.

 

it'll spatter a little more and you'll get a hotter arc, but otherwise it will be fine

 

What he said, i actaully use it alot since i can get the tanks from work and just take it back when its empty and pick up a new one, free gas ....If your welding on decent thickness you wont have a problem, i did some shaving work on a 300Z today and realized my 75/25 was empty when i was hooking it up on labor day, i ran it with 100% and it came out fine...it does get a little hotter though

 

cool... thanks!