In the chart below, you will find the melt and flow points. As I stated earlier in understanding your materials, you must always be sure that the solder you are using flows at a lower temperature than the materials you are joining. When working with silver, the melting point for .999 fine silver is 1761 degrees F and with sterling silver, es 1640 degrees F. With solder, there are multiple flow points available because of the complexity of multi-step soldering.