which mixture of argon / CO2 should I use?

by Jason
(Dalzell, SC, USA)

Just bought a small 125 mig welder. I will be welding 3/16" steel. Should I use 90/10 or 75/25 shielding gas?

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I would go with the 75/25

smoother arc, less spatter, and you cant get into high amperage stuff anyway with a 125 mig.

otherwise the 90/10 would let you do some spray transfer mig for thick stuff.

thanks,
jody

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