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Old 11-27-2017, 07:48 PM
AllyBill AllyBill is offline
MetalShaper of the Month Feb 2019
 
Join Date: Dec 2014
Location: UK
Posts: 375
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Quote:
Originally Posted by crystallographic View Post

Gas welding does its own preheat.[/U]
TIG is sure simple and easy - when you have a gas rig around to help it make the grade.

)
That gas welding sorts its own preheat is true enough, but only because it's painfully slow - a quick blast with a butane torch is all that's needed before you arc up with the TIG and only then in extreme cases. Usually a little patience working the flame about and watching it clean the material is all that's needed. No messy flux, just lots of crackling AC bursting the oxide layer off the surface.
As for filler I've never used 4xxx rods. I use 1xxx for soft material and 5xxx for anything else unless it's exotic in which case I make my own filler from thin strips of the native material or fusion weld it so there's no argument about what's what.
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