Question:We do torch brazing of copper and steel tubing/piping for the HVAC industry, and we try to do a nitrogen purge of the ID of the tubing during our

Question: We silver brazed what we thought was a so-called “oxygen-free” grade of copper (C10200) in our hydrogen brazing furnace at 1500°F (815°C) – using BAg-8 filler metal –

Question:On some of our parts, prior to induction silver braze, we tack weld the parts to be brazed. The parts are fixtured during the tack weld to hold dimensions

In addition to the stop-offs mentioned last time, please note that milk of magnesia, readily and cheaply available from many drug and food stores, is actually a decent stop-off that may prove effective for many general-purpose needs. So, do some experimentation and find out what kind of stop-off works best for you.

As the name of this product type indicates, a brazing "stop-off" is supposed to be something that "stops" molten brazing filler metal (BFM) from flowing into areas where it is not supposed to be, thus keeping it "off" surfaces that are supposed to remain clean and free from the presence of any BFM.

Brazing paste is not difficult to make yourself. All you need is some brazing filler-metal powder, a gel binder and a paint shaker.

Question:We have a question relative to extending the expiration date on braze paste. Do you know of an industry standard that we could reference? Is there a particular rule of

Cleaning Fluxes After BrazingThe ONLY solvent that should be used for removing flux residues from the surface of the parts being brazed is HOT WATER. The hotter the water, the

Brazing fluxes are compounds that are designed to be put onto metal surfaces in order to protect those metal surfaces from oxidation during a brazing process that is being conducted in open air.

Let me make two important statements right at the start: 1. Surface-oxidation of metals will prevent effective brazing. 2. Brazing filler metals (BFMs) do not like to bond to (or flow over) oils, dirt, greases or oxides on metal surfaces.