Tig Brazing is when you use a filler rod that melts at a much lower temperature than the base metal...usually silicon bronze, or aluminum bronze filler metal. So How strong is Tig Brazing? for thin wall tubing, if you can use a large braze joint with lots of braze material that is thicker than the base metal, and if you can braze all the way around, it can be pretty strong. But for a one sided fillet weld...tig brazing is pretty weak. | Welding Tips & Tricks