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It's been quite a while since I used a stick welder, but 7014 is a shallow, flat orientation penetration rod, with a super-thick slag. It was very sensitive to imperfections, and had to be thoroughly cleaned before welding. I would think I did a great job, until I cleaned off the slag, which...

I've welded 3/8"-1-1/2" thick steel with a MIG welder, using ER70-S7 0.035 wire, for a potato hiller, which has held up fine for over 30 years. I used a Miller 250-amp wire feed welder, which I've had since 1991. It's all about the welder, and the wire.

I've used a MIG on the farm for over 30 years, and have welded 3/4"-1"+ steel, with no problems. I've even welded cast iron with the same wire, ER70-S7. I discovered this when my dad tipped over our Harbor Freight drill press, and broke the table crank off. I did the usual double-V grind prep...

I've always had a liking for 7018: it welds through grease, rust, even its own slag. It's designed for welding dissimilar metals. It will weld spring steel to anything.

I'm looking for a multi-process welder to supplement my older, big Millermatic 250. The MIG will be set up for welding stainless (have some projects waiting), and the TIG for welding aluminum irrigation pipe, primarily. I was told that to weld thin wall aluminum, you to have to use AC TIG...

I would like to do the opposite: convert a multi-process welder (MIG, TIG, Stick) into a AC/DC welder so I can weld aluminum tubing. Does anyone know how to do it, and what it would cost?