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solder replacement adhesives
Johnson Matthey Silver-flo™ 24 Silver Brazing Paste
Categories: Metal; Nonferrous Metal; Precious Metal; Solder/Braze Alloy

Material Notes: Silver-flo™ 24 brazing paste is a specially formulated paste product intended for use in semi- automated brazing processes or where the use of a paste offers other advantages. It combines Silver-flo™ 24, a comparatively high melting temperature silver brazing filler metal, in powder form with a flux-binder system selected to match an individual application. The resulting product is a fully dispensable custom-made brazing paste.

The use of a brazing paste can improve joint quality by helping to provide repeatability in the amount of filler metal and flux used. Using a brazing paste can lead to productivity improvements and well as enabling pre-placement of the brazing material which can reduce handling and waste.

Silver-flo™ 24 has a melting temperature of 740 to 800°C with a medium length melting range of 60°C providing moderate flow properties when molten. It can be used to fill gaps that cannot be tightly controlled. The optimum joint gap for this filler metal at brazing temperature is normally 0.075-0.2mm.

This filler metal has been incorporated into aviation / aero industry standards and is consequently used in the manufacture of components for applications in this field. It is also used as the first alloy in a two-step silver brazing operation, where the second joint is made with Silver-flo™ 55.

Silver-flo™ 24 can be used to join all the common engineering materials (excluding aluminum) such as copper, copper alloys (including, brasses, bronzes, gun metal, nickel silvers, aluminum bronze, copper nickel), steels including, mild, carbon, tool steel, stainless steels, low alloy steel). This alloy is not normally recommended for brazing tungsten carbide and PCD segments where Argo-braze™ silver brazing filler metals are often preferred.

Information provided by Johnson Matthey Metal Joining

Vendors:
Available Properties
  • Melting Point
  • Solidus
  • Liquidus
  • Copper, Cu
  • Silver, Ag
  • Zinc, Zn
  
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Solder ReplacementRoHS Compliant Adhesives for Solder Replacement
Master Bond offers RoHS compliant, electrically conductive systems to replace lead soldering. These epoxy and silicone adhesives offer low volume resistivity, low outgassing and high temperature resistance.
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