Braze Alloys
Nicusil® 8 (AMS 4765) Technical Information
High-purity silver, copper and nickel alloy for vacuum brazing
Key Benefits
- Excellent brazing filler for wide gaps
- Better wetting properties than alloys containing only Ag and Cu
- Greater strength than alloys containing only Ag and Cu
Typical Applications
- Aero-engines (OEM and repair)
- Aerospace fuel-line assemblies
- Vacuum tubes
- Wave guide and Klystron assemblies
- Power supply surge arrestors
- Automotive components
Nominal Composition by Weight
- Silver (Ag): 56%
- Copper (Cu): 42%
- Nickel (Ni): 2%
Suggested Base Materials
- Copper
- Nickel
- Kovar
- Metallised ceramic
- Carbon/low alloy & Tool/high speed steel
Forms Available
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Nicusil® 8 Thermal Properties |
||
|---|---|---|
|
°C |
°F |
|
|
Liquidus |
893 |
1639 |
|
Solidus |
771 |
1420 |
|
Nicusil® 8 Physical Properties* |
||||
|---|---|---|---|---|
|
Metric |
Imperial |
|||
|
Thermal Conductivity (Calculated) |
237 |
W/(m*K) |
137 |
BTU/ft h °F |
|
Yield Strength (0.2% offset) |
339 |
MPa |
48.2 |
x103 lb/in2 |
|
Tensile Strength |
366 |
MPa |
53.1 |
x103 lb/in2 |
|
Elongation (2in/50mm gage section) |
20 |
% |
||
|
Electrical Resistivity |
32 |
x10-9(ohm*m) |
||
|
Electrical Conductivity |
31.3 |
x106/(ohm*m) |
||
|
Recommended Brazing Temperatures |
920 - 950 |
°C |
1688 - 1742 |
°F |
|
Recommended Brazing Atmospheres |
10-5 mm Hg, H2, or inert gas |
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* Please note that all values quoted are based on test pieces and may vary according to component design. These values are not guaranteed in any way and should only be treated as indicative values. They should be used for guidance only and for no other purpose whatsoever.