Filler metals are alloys or unalloyed metals which, when heated, liquefy and melt to flow into 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.
A filler metal is a material that melts upon heating to flow in between two adjacent metal workpieces and create a weld joint. It is, generally, an alloyed material with specific melting and flow properties, which can produce a joint that meets service requirements, such as corrosion resistance and mechanical strength.