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this video shows hot pass, fill, and cap on carbon pipe welded to a stainless flange...not walking the cup
This video shows TIG welding several different alloys. Carbon Steel, 4130, Stainless, and Aluminum. Arc Length is key
This video shows tips , settings, cups, and tricks for tack welding stainless steel lap joints. a down and dirty hold down tool also shown
TIG welding Stainless steel is very similar to carbon steel but less amperage is needed and there are a few tips that help prevent heat build up.
A tight arc is important too