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Lucas-Milhaupt SIL-FOS 18 Silver/ Copper/ Phosphorus Alloy

Category Metal , Nonferrous Metal , Copper Alloy , Solder/Braze Alloy
Manufacturer Lucas-Milhaupt
Trade Name SIL-FOS
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Lucas-Milhaupt SIL-FOS 18 Silver/ Copper/ Phosphorus Alloy.pdf
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Material Notes:
Applications: Sil-Fos 18 is a moderate cost brazing filler metal suitable for joining copper, brass and bronze alloys where low brazing temperature and free flowing characteristics are required. It should be used on assemblies where good fitup can be maintained. Characteristics: Sil-Fos 18 is a ternary eutectic, low temperature brazing filler metal that is free flowing and self-fluxing on copper and some high copper an copper alloys by virtue of its phosphorus content. Brasses and most bronzes require the use of Handy Flux (or Handy Flux Type A-1 on Aluminum Bronze or Beryllium Copper) for good wetting. This alloy becomes extremely fluid above its melting point. With most joint designs a clearance of .001" to .003" (.025mm.-.075mm) is desirable. Sil-Fos 18 should not be used on ferrous metals or nickel base alloys, since the phosphorus diffuses and produces brittle iron or nickel phosphides at the joint interface.Information provided by Lucas-Milhaupt, Inc.
Physical Properties Metric English Comments
Density 8.11 g/cc
0.293 lb/in³
Thermal Properties Metric English Comments
Melting Point 643 °C
1190 °F
Solidus 643 °C
1190 °F
Melting Point
Liquidus 643 °C
1190 °F
Flow Point
Component Elements Properties Metric English Comments
Copper, Cu >= 75.15 %
>= 75.15 %
Other, total <= 0.15 %
<= 0.15 %
Phosphorous, P 6.3 - 6.7 %
6.3 - 6.7 %
Silver, Ag 17.2 - 18 %
17.2 - 18 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000294 ohm-cm
0.0000294 ohm-cm
Descriptive Properties Value Comments
Color Gray
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