The heating method most commonly used in brazing a single assembly is the hand held torch. A variety of fuels are available - natural gas, acetylene, propane, propylene, etc., combusted with either oxygen or air. (Most popular is still the oxy/acetylene mixture.)
What is flux used for in brazing?
In metallurgy, a flux (derived from Latin fluxus meaning “flow”) is a chemical cleaning agent, flowing agent, or purifying agent. As cleaning agents, fluxes facilitate soldering, brazing, and welding by removing oxidation from the metals to be joined.
Can you use a propane torch for brazing?
Brazing with Propane. Here is the answer to whether you can braze with a propane / air torch. You can but you have to control the environment so that the heat loss to the atmosphere and parts is lower than the heat being put into the braze joint. Here is a standard handy torch.