... 1.pure tin soldering wire 2.No lead ,10roll/box ,1.0mm 3.99.99% Sn ... solder composition. First choose between leaded or lead free and then between high or low temperature ... is called 'hard soldering', 'silver soldering', or brazing.Lead-free solders in commercial use may contain tin, copper, ... zinc, antimony, and traces of other metals. Most lead-free replacements for conventional Sn60/Pb40 and Sn63/Pb37 ...