[Amps] 3-500 Pins

[Peter Chadwick]

There's a solder called Comsol. 5% tin, 93.5% lead 1.5%silver. Solidus temp 290 deg C: liquidus 300 deg C.
If something higher is needed, there's LM5 which is silver cadmium with a solidus of 338 deg C and liquidus of 390 deg C. 
That's probably starting to push the seals a bit, and needs an exceedingly hot iron. If there's room, a piece of raw potato around the pin and seal would help.
73
Peter G3RZP