Brazing is a technique of joining two similar of dissimilar metal pieces together by heating the surfaces and by using a non-ferrous filler metal having its melting point above 427'C but below the melting points of metals to be brazed. The molten filler metal is distributed between the joint surfaces by the capillary action, which on cooling results in a sound joint. The main advantage of brazing process is the joining of dissimilar metals and thin sections. The process is mostly used for joining pipes and other fittings, carbide tipping on tool shanks, electrical parts, radiator, repair of cast iron parts and heat exchangers.In brazing, bond is produced either by the formation of solid-state solution (diffusion bonding) of intermetallic compounds of the parent metal (job) and one of the metals in the filler material (brazing alloy). The strength of the brazed joint is provided by metallic bonding.

Various brazing methods torch brazing, furnace brazing, dip brazing, induction brazing, infra-red brazing are in applications.