Found this:
"The melting point of 50/50 solder is between 361° and 421° Fahrenheit (183° and 216° Celsius)."
&
"The melting point of soft silver bearing solder can range from 430°F to 535°F. Some examples include:

Harris Stay Brite #8 Lead Free Silver bearing Solder: Has a solidus of 430°F

Stay-Brite silver-bearing solders: Have a temperature range of 430°F to 535°F
Hi-Line Silver Bearing Solder Paste: Flows smoothly at 430°F

Of course, the "hard" silver solder has much higher melting points, akin to "brazing" temperatures.

"Hard silver solder melts at a temperature of 1,365°F (741°C) to 1,450°F (788°C). It's often used for jewelry making and repairs, especially for bezels and as the first step in multiple soldering.
Here are some other types of silver solder and their melting temperatures:

Easy: 671–718°C (silver content 65%)
Medium: 691–738°C (silver content 70%)
Extra easy: 655–710°C