Helium purge

[jeff5may]

Originally Posted by STM

My squirt gun is a Lincoln 125, 120v running flux core now, mainly want the gas for thinner stuff, I'll still have flux core and stick for heavier iron. Done a tiny bit of O/A welding but the MIG is much faster and foolproof. Not too worried about tank size, can leave it in the shop and run a hose out for outdoor work. Dirt floor in the shop I'm in now so won't be rolling even a 40cf around too much and 80cf is more economical to fill. That's my reasoning on the 80 anyway.

So straight argon will give better looking welds on thinner stuff? I'll check the price on it. Shouldn't be much different.

Check out this comparison:

Tests for various gas mixtures on MIG Welding

Dude is obviously not a master welder, but this is a good example of the differences between CO2/Ar blends on thinner metal. It's actually a good thing that the author doesn't have a lot of time under the hood, as an experienced operator knows how to adjust both the machine and his welding procedure to compensate for differences.

[STM]

Originally Posted by jeff5may

Check out this comparison:

Tests for various gas mixtures on MIG Welding

Dude is obviously not a master welder, but this is a good example of the differences between CO2/Ar blends on thinner metal. It's actually a good thing that the author doesn't have a lot of time under the hood, as an experienced operator knows how to adjust both the machine and his welding procedure to compensate for differences.

That's making C25 look better. Lol, that's what I'm used to using with a MIG anyway so it's probably what I'll get.