Brazing is a metal-joining process in which the base metals are not melted.
Instead, a filler metal with a lower melting point is melted and flows between the closely fitted base metals via capillary action.
This distinguishes brazing from welding, where the base metals are typically melted and fused together.
Thus, in brazing, the base metal is only heated below its melting point, while the filler melts and joins the components.