| Silvaloy 655 alloy has been used in brazing of Invar, Kovar, and similar low expansion alloys to copper in vacuum tube applications. This filler can be used for brazing of tungsten carbide cutting tools. In certain instances, Silvaloy 655 alloy has been used as a rubbing seal for jet engine turbine blades. Since it is a silver-copper base alloy, Silvaloy 655 flows well on base metals of both of these elements. As compared to the silver-copper eutectic, this alloy exhibits improved wetting on nickel due to the manganese content and on iron base alloys due to nickel and manganese content. While Silvaloy 655 can be employed in torch brazing with flux, it is more suited to hydrogen atmosphere brazing when dew point of -60°F or better can be maintained. This alloy can be used in furnace brazing applications, as there are no volatile constituents such as cadmium or zinc to condense and accumulate on cooler furnace parts. Available forms: Wire, strip, engineered preforms, specialty preforms. Information provided by Lucas-Milhaupt. |
