Braze Alloys
Incusil®-15 (BAg-29) Technical Information
High-purity silver, copper and indium alloy for vacuum brazing
Key Benefits
- Lowest melting of the ductile low vapor pressure alloys
- Step braze with Cusil
Typical Applications
- Hermetic windows and assemblies
- Heat exchanger
Nominal Composition by Weight
- Silver (Ag): 61.5%
- Copper (Cu): 23.5%
- Indium (In): 15%
Suggested Base Metals
- Copper
- Nickel
- Kovar
- Metallised ceramic
Forms Available
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Incusil®-15 Thermal Properties |
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|---|---|---|
|
°C |
°F |
|
|
Liquidus |
725 |
1335 |
|
Solidus |
605 |
1120 |
|
Incusil®-15 Physical Properties* |
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|---|---|---|---|---|
|
Metric |
Imperial |
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|
Coefficient of Thermal Expansion (CTE) |
18.5 |
x10-6/°C for 20-500°C |
10.3 |
x10-6/°F for 68-932°F |
|
Thermal Conductivity (Calculated) |
55 |
W/(m*K) |
32 |
BTU/ft h °F |
|
Density |
9.8 |
Mg/m3 |
0.35 |
lb/in3 |
|
Yield Strength (0.2% offset) |
386 |
MPa |
56 |
x103 lb/in2 |
|
Tensile Strength |
448 |
MPa |
65 |
x103 lb/in2 |
|
Elongation (2in/50mm gage section) |
19.0 |
% |
||
|
Electrical Resistivity |
141 |
x10-9(ohm*m) |
||
|
Electrical Conductivity |
7.1 |
x106/(ohm*m) |
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|
Vapour Pressure (Calculated) |
2.3 |
10-9 mm Hg @ 500°C |
2.3 |
10-9 mm Hg @ 932°F |
|
1.7 |
10-7 mm Hg @ 700°C |
1.7 |
10-7 mm Hg @ 1292°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.