CO2 with TIG Welding????

**iron bark** · 26th March 2013, 03:24 PM

I was just reading another thread about using CO2 with a MIG welder, and it reminded me I still own a 9kg CO2 bottle from my home brewing days. As I am also in the process of looking at Stick/TIG/Plasma units, I would like to know if I can use CO2 with a TIG.

I don't do much welding in my model making hobby, and can't really justify the exhorbitant rental on a bottle from BOC/Airliquide etc.

Any thought or experiences from anybody who has tried it or knows what is required would be greatly appreciated.

Cheers,

Ned

**Vernonv** · 26th March 2013, 05:55 PM

Straight Argon or Argon/Helium are normally the gases used for TIG. CO2 won't work, sorry.

**WelderMick** · 26th March 2013, 06:29 PM

here's a guy that tried it: TIG with C25 Argon/CO2... Not so Good! - WeldingWeb™ - Welding forum for pros and enthusiasts
and that's only 25% CO2. You might as well just use nothing.

**iron bark** · 26th March 2013, 06:47 PM

[QUOTE=WelderMick;1627338]here's a guy that tried it: TIG with C25 Argon/CO2... Not so Good! - WeldingWeb™ - Welding forum for pros and enthusiasts
and that's only 25% CO2. You might as well just use nothing.[/QUOTE

Thanks Mick - couldn't be more graphic than your link.

Thanks also Vernon for your reply.

Well I guess my question has been well and truly answered.

As an aside, I don't know how these larger companies can justify the rental they charge for gas bottles!!!!!!!!!!!! (but then again, I suppose I do - it's called profit)

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