40/60 Acid Core Wire Solder - Carded 40/60 Alloy of 40% Tin and 60% Lead. 50/50 Alloy of 50% Tin and 50% Lead. 361 F - 421 F melting range for 50/50 Alloy. F - 460 F melting range for 40/60 Alloy. General purpose solder for repairing galvanized gutters, filling metal seams and other general repairs. Contains lead. Not for use on drinking water lines.