Silver Brazing Alloys For Tungsten Carbide Tipped Tools
We manufacture excellent range of brazing filler metals containing nickel specifically for the tungsten carbide tipped tools industry because of its need of protection from crevice corrosion and higher temperature service properties. These alloys are available in forms of wire, foils or shims.
ALFA-409 is used in brazing AISI/300 and 400 series stainless steels, as well as the precipitation-hardening nickel and steel alloys. It is particularly suited to protective atmosphere furnace brazing because of the absence of zinc and cadmium. The nickel content makes it immune to crevice corrosion, particularly on 400 series stainless steel by imparting a nickel rich layer along the fillet edge. It is used for brazing stainless steel vanes of gas turbine aircraft engines.
ALFA-410 is used for service temperature up to 371 C. Its low zinc content makes it suitable for furnace brazing.
ALFA-405A is low melting, free flowing, cadmium free and suitable for use in joining low carbon 300 series stainless steels (particularly food handling equipment and hospital utensils) and small tungsten carbide inserts for cutting tools.
ALFA-405 is particularly suitable for brazing carbide tool tips to tool shanks as it wets the carbide tool tip very satisfactorily. It has a wide wetting range, therefore, the solid and liquid portions do not tend to separate excessively. It is good filler metal for bridging gap. It has good corrosion resistant properties and is particularly suitable for brazing stainless steels also.
ALFA-411 is similar to ALFA-410, except that it contains no zinc, which is advantageous where volatilization is objectionable in furnace brazing.
ALFA-404 is used for brazing carbide tip brazing. Similar to ALFA-405, but higher brazing temperature is required. It flows freely and does not contain cadmium.
ALFA - 404A is used for brazing of tungsten carbide and stainless steels.