SilverAlloy BV-71


INTRODUCTION

Aufhauser SilverAlloy BV-71 is a special alloy for vacuum brazing.

APPLICATIONS

SilverAlloy BV-71 is suitable for vacuum brazing applications at moderate temperatures, e.g. when assembling vacuum tube components. BV-71 contains a small amount of nickel which improves the wetting of the surface of ferrous metals at the expense of a slightly more sluggish flow.


GENERAL INFORMATION

Chemical Composition, Grade 1 (Grade 2)
Ag Cu Ni Zn Cd Pb P C Other volatile
elements *
71.5 ± 1.0 Remainder 0.5 ± 0.2 < 0.001
(< 0.002)
< 0.001
(< 0.002)
< 0.002
(< 0.002)
< 0.002
(< 0.02)
< 0.005
(< 0.005)
< 0.001
(< 0.002)

Total volatile elements 0.01 max. Total non-volatile elements 0.05 max. (*) Elements with a vapor pressure higher than 10-7 torr at 932°F (500°C) such as Mg, Sb, K, Na, Li, Ti, S, Cs, Rb, Se, Te, Sr, and Ca.

ADDITIONAL INFORMATION

PHYSICAL and MECHANICAL PROPERTIES
Solidus (Melting point) 1436°F (780°C)
Liquidus (Flow point) 1463°F (795°C)
Brazing temperature range 1463-1650°F (795-900°C)
Density 10.0 g/cm³ (5.27 troy oz/in³)
Electrical Conductivity, % IACS 78.8
Electrical Resistivity, 10-9 microhm-cm 2.19
Color Silver white
 
SPECIFICATIONS MEET or EXCEED
AWS A5.8/A5.8M BVAg-8b
UNS P07728
 
AVAILABLE FORMS
Powder/Paste
Wire, Strip
Specialty preforms per customer specifications
 
 

Contact Us

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

  • Phone: +1-212-246-0205

  • Email: sales @ brazing.com