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Old 06-24-2018, 11:31 PM
LKeithR's Avatar
LKeithR LKeithR is offline
Hey...wait...is there a prize?
 
Join Date: Aug 2011
Location: Langley, B.C.
Posts: 5,046
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Any ER70S rod will be fine. Unless you're really good you're unlikely to notice much difference between brands--1/16 and 3/32 for size. Even with a Dynasty 350 we seldom use either .045 or 1/8 rods. Remember that in addition to changing amperage you can also regulate output with the size of tungsten you use.

For aluminum 4043 and 5356 are all we use--1/16 and 3/32 although the latter might be more than you can run with 175 amps. If you want to start with just one go with 4043--slightly less strength but better ductility for more dissimilar alloys. Your choice of 309 for SS will be fine. Stainless is the nicest of all to weld so I don't see the need for .045; I'd start with 1/16.

There are so many specialty rods for cast iron and other "difficult" metals it's hard to know where to start. Basic aluminum bronze and silicon bronze will cover a pretty wide range. And remember that if you have a cast iron stick rod that you like there's a good chance it will work just as well or better if you knock the coating off and use it with tig. We've done that many times.

And if you don't want to break the bank buying rods try finding someone you can share with. We have a friend we do that with. We'll buy 10 lbs. of 4043 and 10 lbs. of 5356 and split it. We get 5 lbs. of each for the price of one ten pounder...
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Measure twice and cut once...or...wait, was that the other way around?
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