SilverAlloy BV-61
Nominal Chemical
Composition
INTRODUCTION
Aufhauser SilverAlloy BV-61 is a special alloy (very low level of impurities) for vacuum brazing.
APPLICATIONS
Application is found in all types of moderate temperature low pressure systems, and in particular the electronic vacuum tube.
GENERAL INFORMATION
Chemical Composition, Grade 1 (Grade 2)| Ag | Cu | In | Zn | Cd | Pb | P | C |
|---|---|---|---|---|---|---|---|
| 60.5-62.5 | 23-25 | 14-15 | < 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-61 has excellent corrosion and oxidation resistance, compared to other silver-copper alloys.
PHYSICAL and MECHANICAL PROPERTIES
| Solidus (Melting point) | 1166°F (630°C) |
| Liquidus (Flow point) | 1301°F (705°C) |
| Brazing Range | 1310-1455°F (710-790°C) |
| Density | 9.81 g/cm³ (5.19 TO/in³) |
| Thermal expansion coefficient @ 20-500°C | 18.5 10-6/°C |
| Yield strength (0.2% offset), lb/in² | 56×103 |
| Tensile strength, lb/in² | 65×103 |
| Elongation (2 in/50mm gauge section) | 19% |
| Color | Silver White |
| Electrical Conductivity | 16.0 %IACS |
| Electrical Resistivity | 10.7 μohm-cm |
| Vapor pressure (calculated) @ 600°C | 1.7×10-7mm Hg |
SPECIFICATIONS MEET or EXCEED |
| AWS A5.8 BVAg-29 (ISO 9002) |
| UNS P07627 |
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 |