Quote:
Originally Posted by 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.
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Thanks for setting me straight, Greg. Corrected post to reflect your sage advice. I did use a bottle of 90/10 my neighbor had to finish some light sign work after I ran out of 75/25 and it worked great, but it was all stitch weld on .040 steel. Came out very clean. Will talk to neighbor about his argon suggestion.
Sorry to pass along bad info without following up myself. Won't happen again.