Quote:
Originally Posted by notaduc
Mig welding stainless is ok if they are using stainless wire and argon, technically it should be purged too, but doubtful any shop with just a mig would do that.
A lot of shops will just use mild steel wire and (gas argon/co2) mix to weld on stainless exhausts, this you really want to avoid since it will rust easily.
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using plain steel wire to weld stainless would be the worst hack job ever and anybody who would do that should be ashamed of themselves.
plus, migging stainless can have oxygen in the mix believe it or not
straight argon is for tig