Welding with Argon/CO2 vs CO2

[PorkChop]

Originally Posted by Talonmotorsport

Pub type C02 bottle regulator has a plain nut that screws ON TO the threadhttp://www.ebay.co.uk/itm/Co2-Gas-Re...em256923 191f

Industrial big bottle type regulator has a CONE SHAPED fitting the screws IN TO the bottlehttp://www.ebay.co.uk/itm/Oxygen-Gas...em5d304c b0fd

You can also get a brass adaptor to make the industrial regulator fit the pub bottle if you can find them.... It's also worth using some ptfe tape on the adaptor thread to make it gas tight instead of trying to over tighten the thread.

I'd just like to point out that tape should only be used on tapered threads. If you need to put tape on a straight thread, then the fitting isn't seated correctly. Straight fittings don't seal on the threads. A tapered thread without tape is more likely to leak.

[Trophy Blue]

CO2 is added to pure argon to increase penetration, CO2 on its own will burn into the parent material, but will produce a brittle weld.

[flyerncle]

Some top end regulators as the Siegen one I have will fit both types of bottle.

[robo]

Cant see why anyone would want to use anything other than the correct gas. I once used the argon bottle off the tig on the mig when the mig bottle ran out and the weld looked crap.My mate insists on using pub gas on his mig to save money and those welds always look like they have been frazzed.

Bob

[robo]

Originally Posted by flyerncle

Some top end regulators as the Siegen one I have will fit both types of bottle.

We have used the oxy gauge on the mig bottle before now with no problems.

bob