Welding Tips and Tricks

I have a bottle of trimix gas that I bought years ago to try on stainless. I have only used it once as I rarely weld stainless. Now that I have a TIG welder, I am even less likely to use it.

Is it OK to use the trimix on mild steel just to use it up? I have tried it, but I think that the argon/CO2 mix welds better. Would trimix compromise mild steel welds in any way?

Thanks.

I LOVE to use tri-mix (90%He, 7.5%AR, 2.5%CO2) on carbon steel, and I get away with it at work despite the cost.

The weld is hotter for more penetration, and when dialed in "just so" leaves so little spatter that spatter-spray is not needed.

You will harm nothing, and improve your penetration for the same settings.

Use it up, and enjoy it while you can.

Steve S

Well, that settles that! Thanks for the info.

I will enjoy it while I can, which probably won't be long because it is only a 50 cu/ft cylinder. When it's empty, I will trade it in for a 125 cu/ft Argon/CO2 cylinder. When I emptied my last Argon/CO2 cylinder, I traded it for some Helium. My LWS is really good that way.