Silver solder has other metals, besides silver, alloyed into it. The alloy is primarily silver but the additional metals provide sought-after characteristics for the purpose of bonding. Copper (Cu) is soft and a great heat conductor plus it’s resistant to corrosion. Zinc (Zn) and tin (Sn) have really low melting points, which lowers the overall melting point of the solder. All the silver solders sold at Halstead are lead and cadmium-free. You can find out more of the specifics by reading the SDS sheets on item detail pages on our website, however, the majority of silver solders have a combination of silver, cobre, and zinc and the percentage of each metal varies depending on the solder flow point. The solder metal alloys and general percentages are listed in the chart below.