I have a personal project where I need to solder a stainless steel ring (it’s a 2mm thick rings that goes on top of the watch case that will hold the crystal) onto the the stainless steel mid-case.
I have the “case neck ring” to a nice pressure fit size so all I need to do at this point is choose a solder that I should solder them with. I plan on using the method of locking the entire case and ring in position using investment and clay so that nothing moves.
I think ideally, one would have it laser welded. However, I can’t afford to have someone do this (even if I found a jeweler that has stainless laser welding materials). My guess is that jewelers that have laser welding machines don’t ever stock stainless materials, am I correct? So they would just refuse me.
I have soldered stainless steel before and know about using the black flux that is required. But I’m not sure what is the best solder for this application. I’d like it to be strong and corrosion resistant as this is for a water proof watch build.
Does anyone have recommendations for solder? I think a choice would be a type of Silver Solder but how do I know which ones are more resistant to salt water or chlorine exposure?