I was hoping to get some clarity on the different types of brazing rod/metals. I watched quite a few of YouTube videos and read through the forums but I’m still a bit confused.
Is there a difference between Brass and Bronze brazing? I just brought some brass rod (messing in German), I can’t find bronze rods here in Switzerland. Or are the builders just using these interchangeable?
In Paul Brodies video on fillet brazing he tins the joint first with silver nickel. Is this silver rod (Ag-Cu alloy)? Or is this a silver nickel rod (Cu-Ni-Zn)what I’d call in German Neusilver? Which actually has no silver in it.
Silver rod is used for brazing bottle cage bosses and lugged joints. Right?
Yes, I like to call it brass because its principal elements are copper and zinc, the dictionary definition of brass. But the welding/brazing industry (in the US and Britain anyway, not sure of elsewhere) calls it bronze for some reason. Brazing bronze does have a little tin, as does “dictionary” bronze, though the tin is a small portion of the brazing bronze.
Correct, there is no silver in it. Another poor naming choice that became the standard industry jargon for some reason.
Yes among other things. High silver content rod like 56% should only be used on tight fitups with substantial wetted area. Lower silver content like 40 or less can be used to build a fillet, but it’s inferior to brass for that, unless you’re joining stainless, which brass doesn’t wet out on or bond to properly. Nickel-silver (with zero silver) does work on stainless and it’s very strong, but its liquidus is higher, so there are trade-offs.