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**dennislbrooks** · 12-28-2005, 09:11 AM

agree with phantom dually, I use 100% argon on my TIG for both steel and aluminum but I use the mix for my MIG. CO2 is less expensive than argon and has superior heat conductivity. unless you are welding 4130 --- 100%
C02 can be used however I have not tried it.

12-28-2005, 09:11 AM	#3
dennislbrooks Registered User Join Date: Feb 2004 Location: Williamsburg, Ohio Posts: 1,807	Re: Welding gas for MIG? agree with phantom dually, I use 100% argon on my TIG for both steel and aluminum but I use the mix for my MIG. CO2 is less expensive than argon and has superior heat conductivity. unless you are welding 4130 --- 100% C02 can be used however I have not tried it.