SilverAlloy BV-72


INTRODUCTION

Aufhauser SilverAlloy BV-72 is a special alloy (very low level of impurities) for vacuum brazing.

APPLICATIONS

When strong, robust, integral joints are required:

  • Aeronautical manufacturing and repair
  • Aeronautical joining of fuel-lines
  • Electrical vacuum tubes
  • Linear-beam vacuum tubes (klystrons) and electrical wave guides
  • Power supply surge protectors
  • Automotive parts

GENERAL INFORMATION

Chemical Composition, Grade 1 (Grade 2)
Ag Cu Zn Cd Pb P C
71-73 27-29 < 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

PHYSICAL and MECHANICAL PROPERTIES
Solidus (Melting point) 1436°F (780°C)
Liquidus (Flow point) 1436°F (780°C)
Density 10.0 g/cm³ (0.361 lb/in³)
Thermal expansion coefficient @ RT-932°F (RT-500°C) 10.9 10-6/°F (19.6 10-6/°C)
Young's modulus, GPa (lb/in²) 83 (12×106)
Yield strength (0.2% offset), MPa lb/in² 272 (39×103)
Tensile strength, MPa (lb/in²) 372 (54×103)
Elongation (2 in/50mm gauge section) 19%
Electrical Conductivity, 106/ohm-m 49.0
Electrical Resistivity, 10-9 ohm-m 20.4
Knoop Hardness, KHN expressed as MPa 1010
 
SPECIFICATIONS MEET or EXCEED
AWS A5.8 BVAg-8 (ISO 9002)
 
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
 

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Contact Us

  • Address:
    Aufhauser Corporation
    39 West Mall, Plainview, NY 11803 USA

  • Phone: +1-212-246-0205

  • Email: sales @ brazing.com

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