I got a Millermatic 170 a few months ago and I ran out of a bottle of Argon/CO2 gas in the middle of building something. I finished up the project without gas and the welds looked horrible. I didn't think if it then but I have a tank of helium in the garage that I used for filling balloons and havn't got around to returning the tank. There's still quite a bit of helium left. Could helium be used? What would the differences be? I'd be welding steel 1/4" or less, mostly angle iron, rebar and square tubing.
19 years ago