General welding questions that dont fit in TIG, MIG, Stick, or Certification etc.
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Rastas
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    Sat Sep 15, 2012 9:51 pm

Hey guys, anybody know if it's possible to weld stainless steel to copper, and how it's done? Making a small project at home involving 1/4" s/s nuts to be welded to the end of a 3" length of 1" diam. rod.
Cheers.
mspanky
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    Wed Sep 19, 2012 11:17 pm

You will need to silver braze the two pieces together using brush-on flux and silver wire or flux coated silver rods. Harris is the brand I commonly use. The filler is also brittle, so the joint will be strongest if the there is plenty of material overlap. i.e. copper sweat fittings
RedIron881
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    Fri Mar 23, 2012 9:29 am
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    Phoenix, AZ

Could you use Silicon Bronze? I've welded Copper to Mild Steel with it. Not a very strong weld but might be a cheaper alternative. I'd also say you should pre heat the copper pieces.
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