Mike B wrote:
I need to join a 316 stainless steel tube to a copper plated fibreglass circuit
board which can only withstand lead tin soldering temperatures (180 C).
.
If I 'tin' the stainless using silver solder (Weldcote Metals 50 N) will I be
then be able to use 60/40 tin/lead solder to join it to the copper?

If that isn't going to work then I'll have to silver solder a copper ring around
the tube then solder to that.

Mike

Why? Take the stainless tube. Clean it VERY well on the end. Use a
stainless wire brush and while you brush the stainless use regular
solder to tin the stainless. Then solder as normal.

--
Steve W.