CO2 is not suitable for welding aluminum. Argon is normally used. John
Nils O. Ny wrote:
> At 07:58 AM 11/12/1998 -0600, nogera@juno.com wrote:
> >
> >When welding mild steel with a MIG set up, is there any advantage to
> >using Argon or a Argon Co2 mix as apposed to CO2 ? Also my supplier
> >says if I switch to argon I will have to change my regulator to a Argon
> >regulator. Can use my current regulator and change out the regulator
> >input fitting ?
> >
> >And finally, my Mig has four amp settings , well true to my life the 22 g
> >metal of my current project seems to fall right smack between 1 and 2.
> >Any suggestions as to techniques to reduce the heat to prevent burn
> >through.
> >
> >Bob Nogueira
> >
>
> Normal mix for MIG welding is 75% Argon 25% CO2. If you are indeed
> using straight CO2 you should get much better looking welds with the
> Argon mixture. I believe that the only reason you would go to straight
> CO2 is for Aluminum or a hotter more volitile arc on steel ?
>
> Regards, Nils
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