TIG brazing

[chrisalys]

Hi does anyone have any knowledge about tig brazing ie what rods do you use, what sort of current ac or dc how much ampage do you need for 16swg sheet . Any help would be great.
Cheers Chrisalys

[raferguson]

I have brazed with my TIG (actually was a mistake, but that is another story). I believe that I was using silicon bronze rod. Definitely use DC polarity. I think the current is similar to that used for welding, although logically it must be lower since the temperature is lower.

I would approach it like I was welding, but use a flux.

Perhaps someone with more experience brazing with TIG will chime in.

Richard

[Marty Comstock]

when i use SIB for mating steel together, or for filling voids i dont use a flux. i am careful however not to melt the steel, unless that is what im trying to accomplish, welding using SIB.

[rkilgore29]

Chrisalys,

Welcome to the group.

You can use silicon bronze rod for TIG brazing, no flux required. Since you are brazing you want to keep from melting the base metal. This has been a well used process for brazing galvinized sheetmetal, it helps to retain the corrosion resistance. I would not recommend it for steel simply because it is as easy to TIG weld as it is to TIG braze and the end result of the welding is better for most applications.

[superleggera]

A friend in the restoration business has got all excited by Tig Brazing as of late as there is less heat going into the metal -- said I should try "Silicon Bronze Tig 3-SIB". Never done TIG brazing before. (Although I TIG steel/aluminum on a regular basis)

Anyone have feedback? I asked the local AirGas and other welding suppliers -- clueless as usual.

Saw this existing thread on here and wondered if anything new since then?