Is a 120 volt welder powerful enough to weld most steel? What amp range is strong enough to weld 3/8" steel? I am inquiring because I am purchasing one very soon to start on my K5 and I have a budget of $300. I know how to use a wire feed, but I guess I can learn to stick weld if I have too. I would much rather have a wire feed though but the 230v ones are just to expensive.