Vacuum brazing filler metals have appropriate melting point, excellent wettability and filling performances. They also have high mechanical strength, good plasticity and electrical conductivity. The products are applied to the brazing of copper alloys, stainless steel, carbon steel and hard alloys. Silver flux can be added in order to achieve desirable brazing joints. Our products series include BAg50Cu(AWS A5.8: BVAg-6b), BAg70CuNi, BAg72Cu(AWS A5.8: BVAg-8), BAg72CuNi, they are suitable for vacuum interrupters, magnetrons, electron emission tubes, discharge tubes, etc.