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Tig and Mig gasses
Posted: Thu Jan 28, 2010 7:27 pm
by eide
Why do you need two different types of gases for mig and tig? (generally speaking)
And what happens if you use straight argon for mig... argon/C02 with tig?\
Just curious.
Re: Tig and Mig gasses
Posted: Thu Jan 28, 2010 10:38 pm
by brian
You can use 100% Argon with hardwire or outershield fluxcore. The hardwire does not weld as nice with 100% as 75% / 25%. Im not sure why though. As for TIG with 75% / 25% The carbon in the CO2 contaminates the hot tungsten and makes for a not so nice weld.
Re: Tig and Mig gasses
Posted: Fri Feb 12, 2010 12:03 pm
by jpence38
Depending on the situation, the things to consider are: arc energy, penetration, arc stability, and spatter. You need to determine what gas or combination of gasses will give you optimum performance in those areas. Brian is correct in not using CO2 for TIG. Generally speaking, 100% argon is the best all-around gas for TIG. A 75/25 is best all-around gas for solid wire mig and if you are using a dual-shield mig wire than go with 100% CO2.