What welding methods are used to join or repair LARGE (10") sterling silver castings? I have large cast vases and solder and torch do not work.
A laser welder would work well to repair silver castings. Torch and solder will work and it requires patience and the knowledge that the heat of the metal melts the solder and not the flame.
Some jewelers have invested in laser welders and will do the work for you for a fee. I would check your phone directory for possible listings.