Brazing. Welding joins metals by melting and fusing them together, usually with the addition of a welding filler metal. The joints produced are strong, usually as strong as the metals joined or even stronger. While welding creates metal joints by applying concentrated heat at the joint to melt and fuse metals together, brazing involves significantly lower temperatures and does not entail the melting of base metals. Instead, a filler metal is melted and forced to flow into the joint through capillary action. It offers one plus, strength property made, the welded joint is at least as strong as the metals joined. Brazing is a special process that produces strong joints at low temperatures. Brazing is a special process that produces strong joints at low temperatures, obtained through a diffusion process with no melting of the base metal