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I have been doing alot of reserach about MIG vs Arc. I contacted Miller here is their response: Scott, If you have the same filler metal tensile strength and set the machines to have the same heat input the end result should be the same. With the GMAW process you can use different shielding gases to give different penetration profiles but in the end with both processes you should be able to get the same results. John Granato Welding Engineer, Integrated Mig Systems Miller Electric Mfg. Co. An ITW Company 1635 West Spencer St. P.O. Box 1079 Appleton, WI 54912-1079 I am going to do a few pressure stress tests of my own, because of the wide array of answers I am getting, just to be sure. Thanks, Scott Waters Hotmail: Trusted email with Microsoft’s powerful SPAM protection. Sign up now. |