220 question for welder ?

[GregWeld]

Sorry RixTrix --- That is bad advice.

Pure argon will make a LOUSY MIG weld.... unless he's welding aluminum.

Not sure where you got your information... but it's just plain wrong. I'm not saying this to be mean - or to embarrass you personally... Many folks read these threads and bad information can lead to people doing things incorrectly.

To the OP (Original Poster) == stick to using 75/25 CO2/Argon mix for MIG welding. The pure argon will have lousy penetration - poor wetting - and undercutting.