| Silvaloy
B-72 (BAg-8) |
 |
| Nominal Composition: |
|
|
| Silver |
|
72.0
± 1.0% |
| Copper |
|
Balance |
| Total
other elements |
|
0.15%
Max. |
| Physical Constants: |
|
|
| Solidus |
|
1435°F
(779°C) |
| Liquidus |
|
1435°F
(779°C) |
| Brazing
Range |
|
1435-1650°F
(779-899°C) |
| Specific
Gravity |
|
9.06 |
| Density
(lb/cu.in.) |
|
5.25 |
| Electrical
Conductivity (% IACS) |
|
87.0 |
| Electrical
Resistivity (Michrohm-cm) |
|
2.00 |
| Color |
|
White |
DESCRIPTION:
Silvaloy B-72 is the eutectic composition of the silver-copper
system. It is suitable for use in a controlled atmosphere brazing
without the use of a paste flux. When molten, Silvaloy B-72 is
very fluid and may flow out over the work surfaces during some
furnace brazing applications. The wetting action on ferrous metals
is limited, minimizing its use on carbon steel. Improved wetting
observed when furnace brazing of stainless steel with silver-copper
filler metals. Most applications for this alloy are on copper
and nickel base alloys.
PROPERTIES
OF BRAZED JOINTS:
Generally, the joint strength using Silvaloy B-72 will surpass
the strengths of the base metals. Strength is a function of the
base metals being joined, type of joint, design of joint, joint
clearances, and brazing procedures. The recommended maximum operation
temperature for Silvaloy B-72 is up to 400° in continuous service
and up to 600° in intermittent service. Where improved corrosion
resistance is needed, nickel may be added to the euctectic composition.
APPLICATIONS:
Typical applications are the joining of ferrous, nonferrous, and
dissimilar metals and alloys with close joint clearances.
| SPECIFICATIONS: |
|
| AWS
A5.8 |
BAg-8 |
| ASME
|
BAg-8 |
SAFETY INFORMATION:
It is essential that adequate ventilation be provided so that
personnel will not inhale gases and fumes while brazing. The operation
and maintenance of brazing equipment or facility should conform
to the provisions of American National standard (ANSI) Z49.1,
“Safety in Welding and Cutting.” For more complete information,
refer to the Material Safety Data Sheet for Silvaloy B-72.
AVAILABLE
FORMS:
Standard forms of Silvaloy B-72 are wire, strip, and preforms.
|
