Dale-

Compared to the wire-feed 'mig' process, tig is the old fashioned way!
It has it's place, but it's important to consider the temperatures needed to get that steel to flow.
the limited heat affected zone of the tig process can be a liability, depending on what the parent materials are.

Tradition has low temp solder, high temp silver, and bronze based brazing alloys the joint fillers of choice around gun breeches and barrels -- all for good reasons!

--Tinker