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SIL-FOS 5

Product Overview

Sil-Fos 5 is a silver-copper-phosphorus alloy for copper-copper brazing but can also be used to join brass with an appropriate flux (e.g. Handy Flux, Ultra Flux). It is a more cost effective Ag-Cu-P alloy, though it does not penetrate deep joints easily.
  • Joins CU to CU (phosphorus serves as flux)
  • Joins CU to Brass (flux is recommended)
  • Lower cost alternative to higher silver content Ag-Cu-P alloys
  • Medium flow
  • Made in USA

Typical Industry Applications:

HVAC/R refrigerant systems, air conditioning coils, evaporator coils

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Product Details

Name:SIL-FOS 5

Nominal Composition:Silver 5.00, Copper 89.00, Phosphorous 6.00

Liquidus:1325 °F °, 718 °C

Solidus:1190 °F °, 643 °C

Max Recommended Brazing Temperature:1500 °F, 816 °C

Heating Methods:Controlled Atmosphere, Open Air

Industry Specifications:

  • AWS: BCuP-3
  • ISO 17672: CuP 281

Distribution Offerings

Custom solutions available upon request.

Product NameDimensionsCase QuantityOEM FormsOEM Range
32299.050"x.125"x5' length coil6/boxWireDiameter
32302.050"x.125"x22' length coil5/boxWireDiameter
95060.125"x.050"x20" : 28 rods25 lbsStripThick x Width
95071.125"x.050"x20" : bulk25 lbsWireDiameter

Common Industries

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HVACR

Lucas Milhaupt offers the best brazing alloys, soldering products, and HVAC/R brazing equipment on the market. Learn how we help HVAC OEMs & Service Technicians improve their brazing process.