Use
solder: An alloy used to join metalsurfaces. A soft solder melts at a temperaturein the range 200–300°C andconsists of a tin–lead alloy. The tincontent varies between 80% for thelower end of the melting range and31% for the higher end. Hard solderscontain substantial quantities of silverin the alloy. Brazing solders areusually alloys of copper and zinc,which melt at over 800°C.