Originally Posted by spider
Stainless is super easy to mig. Runs same as mild steel with the right wire and gas. I've done a bunch of commercial kitchen stuff w/my Lincoln sp125 110 wire feed. The key to aluminum is cleanliness of metal. Don't use grinding disks used for mild steel on your aluminum. They make special disks both sanding and grinding for aluminum. Wipe with alcohol and then weld before oxidization sets in. Aluminum dissipates heat much better than steel, make sure to get your aluminum hot with your tungsten and then melt in your filler rod to your base material. And most of all have fun. Oh make sure to keep your skin covered up or you will fry yourself. It will kill credit card strips too. High freq. is nuts. I do like a good welding thread lets keep it rolling.
spider, I'm finding a hard time getting a good balance between heat and burn-through with SS wire and thin SS.
0.23 ER 308L welding 18ga SS. If I turn the heat too low (or wire speed too fast), the wire gets very "sticky" and bird poops a lot. If I turn the heat up, I get burn-through pretty quickly. Suggestions?
I backed it up with copper scrap as best I could, but I still got a lot of sag on the back--a lot more than I got with similar mild steel work.
I am using C25. I was hoping to not have to buy another bottle! guy at the LWS said the worst problem I'd have was oxidation, which I wasn't terribly worried about.