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RE: Misc junk: welding to stainless, car jack pads, and tracing

To: "'Mike Lee - Team Banana Racing'" <mikel@ichips.intel.com>,
Subject: RE: Misc junk: welding to stainless, car jack pads, and tracing
From: "PHINNEY,HARRY K (HP-Corvallis,ex1)" <harry_phinney@hp.com>
Date: Fri, 11 Jan 2002 09:38:51 -0800
Mike Lee wrote (in part):

>  Would I be 
>  able to weld
>  the nuts on with my MIG setup, or do I need to get some 
>  stainless nuts and
>  have a shop weld them on for me?

For the best possible weld you should get stainless nuts, weld them with a
low carbon stainless filler, and use a different blend of gas. You can
probably get away with using regular nuts and your current MIG setup, but
the corrosion resistance will not be good at the weld or on the nuts, and
you _might_ experience cracking problems at the weld. The overall quality of
the weld will  depend on the exact stainless alloy of your pipe, the alloy
of mild steel wire, and the amount of CO2 in your shielding gas. Additional
carbon in the weld area is a bad thing, so lower carbon filler wire (best is
something like 309L, or 312 stainless), and no CO2 (a carbon source) in the
gas helps.

Harry Phinney

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