Quote Originally Posted by 61bone
When I do use moly, guess what. Out comes the OA It is faster than a Tig and I think does nicer welds. One thing it has over Tig is preheat takes care of itself.

4130 Chromoly was actually developed for the aircraft industry and was formulated to be fairly easy to gas weld(OA). All this was done before TIG was even developed.

It's a shame that the local VoTech welding program doesn't even teach gas welding anymore. Just another skill that's going the way of dinosaurs like me.

Mike