Lead and lead-free alloy solder wire, solder wire from the major categories is divided into different prices according to the diameter of the common wire diameter 0.5mm \ 0.6mm \ 0.8mm \ 1.0mm \ 1.2mm of course, other wire diameter such as the finest core to 0.1mm. Now I write the common alloy of tin wire and corresponding metal prices of raw materials (in recent days Shanghai metal offer guided over), the general price of tin wire on the price of raw materials in the metal processing fee plus a certain amount (the finer processing fees more expensive), so to tell you alloy, if the price is lower than the price of raw materials, the description of the composition of the solder wire problem.