"welding" aluminum with Argon/Co2 mix

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Anyone have any pix of what you end up with if you try to MIG aluminum about 3/16 thick for say....a motorcycle fender using co2?  Just got me a 300 cuf tank for use on sheetmetal (steel) but I never tried aluminum on the mig.  I tried with flux core  just to see what I get but obviously it only made a mess and a bunch of holes.
Reply:dont do it dont even try you need argon or argon / Eh mixChuckASME Pressure Vessel welder
Reply:For Aluminum only Argon or Argon/Helium, as chopper saidSMAW,GMAW,FCAW,GTAW,SAW,PAC/PAW/OFCand Shielding Gases.  There all here. :
Reply:Yes, that is not the right mix but as 3 weelin geezer asked "What does happen ?" if theres CO2 in the mix when doing ally?It would be good to know , even if its only to recognize if you've hooked up the wrong bottle.A good guess is better than a bad measurement
Reply:You said you tried flux-cored?Are you also trying to use a steel wire to weld aluminum?
Reply:Originally Posted by MAC702You said you tried flux-cored?Are you also trying to use a steel wire to weld aluminum?
Reply:I can tell you if you use C/25 to tig carbon steel with , the arc is hard to start and crappy.  Its useless.  Co2 is a reactive gas.  You can only tig with inert gases.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:As an experiment I tried hooking up argon/co2 to the tig on aluminium.  I couldn't even get the acr to start, the surface of the aluminium wound up burned and pitted the the tungsten went all nasty and grey.Just don't do it kids..
Reply:I still want to hear if it was flux-core!!!!? On Aluminum?SA200,Ranger8,Trailblazer251NT,MM250,Dayton225AC,T  D-XL75,SpoolMate3545SGA100C,HF-15-1  RFCS-14 When I stick it, it stays stuck!
Reply:Originally Posted by BrettYes, that is not the right mix but as 3 weelin geezer asked "What does happen ?" if theres CO2 in the mix when doing ally?It would be good to know , even if its only to recognize if you've hooked up the wrong bottle.
Reply:I stand corected.  DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:David Nitrogen is also an inert gas and canot be used. SMAW,GMAW,FCAW,GTAW,SAW,PAC/PAW/OFCand Shielding Gases.  There all here. :
Reply:Originally Posted by weldgaultDavid Nitrogen is also an inert gas and canot be used.
Reply:To answer the question-- what results when you try to MIG weld aluminum with an argon/c02 mix gas, is a mess, at least with a 25% c02 mix anyways, in my experience (hooked up the wrong bottle).  I've not had occasion to try it with other mixes.  It is about like trying to MIG weld steel with a steel wire, without shielding gas.   I'm sure most of us know by mistake how that turns out...MM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:Originally Posted by hotroddernitrogen is not inert. the inert (or noble gases) are group 8 of the periodic table- helium, argon, xenon and some others whose names escape meit is sometimes used in small quantities (around 2% in argon) for welding duplex (not sure whether it's used as a purge/shield or both though)- something about the nitrogen helping stabilise the austenite  . i believe it can also be used as a PURGE gas when welding austenitic stainless for certain applications
Reply:Originally Posted by MAC702You said you tried flux-cored?Are you also trying to use a steel wire to weld aluminum?
Reply:Originally Posted by hotroddernitrogen is not inert. the inert (or noble gases) are group 8 of the periodic table- helium, argon, xenon and some others whose names escape meit is sometimes used in small quantities (around 2% in argon) for welding duplex (not sure whether it's used as a purge/shield or both though)- something about the nitrogen helping stabilise the austenite  . i believe it can also be used as a PURGE gas when welding austenitic stainless for certain applications