50/50 Alloy of 50% Tin and 50% Lead. 40/60 Alloy of 40% Tin and 60% Lead. 361°F - 421°F melting range for 50/50 Alloy. 361°F - 460°F melting range for 40/60 Alloy. Commonly used for tin plating, seaming joints, copper DWV systems and sheet metal repair. Contains lead. Not for use on drinking water lines.