Can I MIG SS with Argon or do I need TRI MIX?

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I TIG SS with Argon with out a problem. For a while I had a small tank of TRI MIX to weld MIG SS and used it to fix some flow related problems on my exhaust.  1)Since I TIG SS with Argon why can't I MIG SS with Argon? Was a Salesman blowing smoke up my backside?Thermal Dynamics Cutmaster 42Thermal Arc 181iHarbor Freight TIG StickHarbor Freight Spot WelderM W AC Buzz BoxM W High Frequency Arc StabilizerSidney Gear Head Lathe Brown & Sharpe Mill with Tree Vertical Head and Sargon DRO
Reply:MIG and straight argon won't work very well(except on alum), it won't give good penetration. For thin gauge SS you would want either a helium based tri mix(A1025) or an argon/CO2/nitrogen mix.
Reply:if you welding SS steel then this is MAG welding, may mean (metal active gas). Mix argon and some active gas for the penetration . MIG means (metal inert gas) you weld precious metal with this weld process . whit inert gas ( argon of helium ).
Reply:cheapest is probably 2-3% CO2, balance argon.  This will work best for spray, you can muddle along on short-arc thoughExperience is something you get right after you need it
Reply:To add to this argon is a non-reactive gas. You need a small amount reactive gas to initiate and enhance  the arc and wire transfer. A very small amount of Co2 will do the job. I believe the limit is 2 to 3% max Co2. This blend is commonly called Stainmix and is much cheaper than trimix gas.Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:Thanks, I did a website search and turned up nothing. When I did a Google search, a thread on Welding Web came up and one member posted a link to Ed Craig's site: http://www.weldreality.com/MIG_welding_gases.htm  Looks like the Argon 98% and CO2 2% is more cost effective than Tri Mix, but takes some adjustments to make it work as well. Since I have not MIG welded much with Tri Mix, practicing with argon 98% and CO2 2% would be the best move for me.Thermal Dynamics Cutmaster 42Thermal Arc 181iHarbor Freight TIG StickHarbor Freight Spot WelderM W AC Buzz BoxM W High Frequency Arc StabilizerSidney Gear Head Lathe Brown & Sharpe Mill with Tree Vertical Head and Sargon DRO
Reply:Originally Posted by warp2dieselThanks, I did a website search and turned up nothing. When I did a Google search, a thread on Welding Web came up and one member posted a link to Ed Craig's site: http://www.weldreality.com/MIG_welding_gases.htm  Looks like the Argon 98% and CO2 2% is more cost effective than Tri Mix, but takes some adjustments to make it work as well. Since I have not MIG welded much with Tri Mix, practicing with argon 98% and CO2 2% would be the best move for me.