The main thing with silver solder, no matter the grade, the joint must be close. Silver solder adheres to the surface and the strongest bond is when the two surfaces are close together.
If you want to fill a gap then braze it.
The other golden rule is to heat the joint and the solder will draw in as soon as the joint is ready.
If you get the heat on the solder before the joint is up to temperature then you risk vapourizing the silver content and everything gets messy.
I used to do silver soldering jobs for the aircraft industry and they're pretty fussy.
Ian. |