Al A. wrote:
I have a 30 or so pound roll of stainless MIG wire,
Harris ER309L. Forgive me if this is a dumb question, but
is this stuff any good for welding things that are
not stainless? Could this, for example, be used to weld
"regular" steel, non-critical stuff like angle iron, etc?

I would try taking your 30 lb roll to some welding shops and see if you
can trade it in for two 30 lb rolls of regular steel. Both you and the
welding shop would come out ahead.

Dan