Tungsten turning dark gray

[performance]

A Mig shouldn't use pure argon, unless you are doing aluminum. I was wondering about that. Is that what you are doing?

[jtybt]

Naw! The MIG and TIG are for mostly SS and some aluminum. I thought you could use Argon for both...at least that's what I've been doing. I have a separate Harbor freight TIG/Stick and a flux core for steel. That little inverter TIG/stick is the neatest little stick welder I got. It's the size of a small loaf of bread.

[performance]

You'll get better bead contour and results with at least 18 percent CO2 for MIG. I use a 18% blend for spray on mig...however you'll get better results with a 75/25 mix of Argon/CO2. Aluminum is the only thing good for pure argon and MIG. It seem everyone wants a "one" gas solution. If there was such a thing, then there'd probably be a "one" welder solution. The CO2 in the mix is critical for penetration and heating up the weld.

[jtybt]

OK! Thanks again.

I'm learning more every day.

This site rocks...QUICK responses!

[everlastsupport]

C25 (75/25) for MIG steel.

Argon for the rest on TIG and aluminum MIG.

Two types of gas handle it all to start. If that is not working, more practice.

Then you get to Mark's level with spay and the helium/aluminum mixes.