SilverAlloy BV-68
Nominal Chemical
Composition
INTRODUCTION
Aufhauser SilverAlloy BV-68 is a special alloy (very low level of impurities) for vacuum brazing.
APPLICATIONS
Use Aufhauser SilverAlloy BV-68 on ferrous and non-ferrous alloys. Because of its low vapor pressure SilverAlloy BV-68 performs excellently in vacuum applications. For example: in the assembly of electronic valves and vacuum tubes. Use it also when brazing metallized ceramics to nickel-cobalt-iron assemblies or joining glass to metal seals.
GENERAL INFORMATION
Chemical Composition, Grade 1 (Grade 2)| Ag | Cu | Pd | Zn | Cd | Pb | P | C |
|---|---|---|---|---|---|---|---|
| 67-69 | 26-28 | 4.5-5.5 | < 0.001 (< 0.002) |
< 0.001 (< 0.002) |
< 0.002 (< 0.002) |
< 0.002 (< 0.02) |
< 0.005 (< 0.005) |
All other metallic impurities having a vapor pressure higher than 10-7mm Hg at 500°C are limited to 0.002% each. Impurities having a vapor pressure lower than 10-7mm Hg at 500°C are limited to a total of 0.075%. (This applies to all forms except powder and extrudable paste.)
ADDITIONAL INFORMATION
Aufhauser SilverAlloy BV-68 has excellent corrosion and oxidation resistance, compared to other silver-copper alloys.
PHYSICAL and MECHANICAL PROPERTIES
| Solidus (Melting point) | 1461°F (794°C) |
| Liquidus (Flow point) | 1497°F (814°C) |
| Brazing Range | 1490-1650°F (809-899°C) |
| Density | 9.98 g/cm³ (5.26 TO/in³) |
| Color | Silver White |
| Electrical Conductivity | 48.3 %IACS |
| Electrical Resistivity | 3.57 μohm-cm |
| Vapor pressure (calculated) @ 700°C | 1.3×10-6mm Hg |
SPECIFICATIONS MEET or EXCEED |
| AWS A5.8 BVAg-30 (ISO 9002) |
| UNS P07287 |
| EN 17672 Pd 287 |
AVAILABLE FORMS |
| Powder/Paste |
| Wire, Rods*, Foil |
| Specialty preforms per customer specifications |
*STANDARD SIZES AND DIAMETERS |
| Diameters: 1/32", 3/64", 1/16", 3/32", 1/8" |
| Sizes: 1, 3, 5, or 50 troy ounces |