Soldering each type of solder and alloy has different melting temperatures. The term "silver solder" denotes the type of solder that is used. Some soft solders are "silver-bearing" alloys used to solder silver-plated items. Lead-based solders should not be used on precious metals because the lead dissolves the metal and disfigures it. The distinction between soldering and brazing is based on the melting temperature of the filler alloy. A temperature of 450 °C is usually used as a practical demarcation between soldering and brazing. Soft soldering can be done with a heated iron whereas the other methods typically require a higher
Sopormetal Sopormetal Sopormetal International Group was founded on February 2, 1985. It began as a Portuguese company supplying brazing materials, silver and copper brazing solders. SOPORMETAL is a producer of brazing materials such as silver solders, copper/phosphorus, soft solders and fluxes. Cadmium-free silver solder, special alloys and tri-metal alloys for the entire industry, as well as several special alloys in the form of rod, strips, rings and various preforms. Coated silver solders with different ratios having regard the technology used for brazing and fusion technical parameters. Copper phosphorus alloys with and without silver for all sectors, as well with different types