filler metal

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Filler metals are an alloy or pure metal which, when heated, liquefies and melts to flow onto the space between two close fitting parts, creating a brazed or soldered joint. A filler metal has suitable melting and flow properties to permit distribution by capillary attraction in properly prepared joints. Filler metals produce joints that meet service requirements, such as strength and corrosion resistance. They also meet specs. of the American Welding Society, AWS and The American Society for Testing Materials, ASTM. Standard filler metals include tin, lead, silver, lead-free, cadmium-free, sil- phos, copper, aluminum, nickel, and jewelers gold. Filler metals are found in solid form like rings and wire, slugs, washers, powder, and paste. Fusion filler metals are atomized into powder form and include with flux in a paste composition.

Filler Metals and Fluxes