A brazing alloy is a filler metal which, when heated, liquifies and melts to flow into the space between two close fitting parts, creating a brazed joint.
A brazing alloy has suitable melting and flow properties to permit distribution by capillary attraction in properly prepared joints. Brazing alloys produce joints that meet service requirements, such as strength and corrosion resistance. They also meet the specifications of the American Welding Society (AWS), The American Society for Testing Materials (ASTM), and in nearly all cases, ISO standards as well.
Standard brazing alloys include tin, silver, cadmium-free, sil- phos, copper, aluminum, nickel, and jewelers gold. Brazing alloys are found in solid form as rings and wire, slugs, washers, and powder, as well as paste. Fusion brazing alloys are atomized into powder form and include with flux in a paste composition.
Most brazing alloys have less shear strength than the base metals they join.