|
| Silvaloy
50 (BAg-1a) |
|
| Nominal Composition: |
|
|
| Silver |
|
50.0
± 1.0% |
| Copper |
|
15.5
± 1.0% |
| Zinc |
|
16.5
± 2.0% |
| Cadmium |
|
18.0 ± 1.0% |
| Total
Other Elements |
|
0.15%
Max. |
| Physical Constants: |
|
|
| Solidus |
|
1160°F
(625°C) |
| Liquidus |
|
1175°F
(635°C) |
| Brazing
Range |
|
1200-1400°F
(648-760°C) |
| Specific
Gravity |
|
9.45 |
| Density
(T.oz./cu.in.) |
|
4.98 |
| Electrical
Conductivity (% IACS) |
|
23.9 |
| Electrical
Resistivity (Michrohm-cm) |
|
7.00 |
| Color |
|
Light
Yellow |
DESCRIPTION:
Silvaloy 50 is one of the lower melting brazing alloys composed
of silver, copper, zinc and cadmium. It is suitable for use on
most metals except aluminum and magnesium. It is used for joining
steel, stainless steel, copper, copper alloys, nickel, nickel
alloys or combinations of these metals. It has wide acceptance
by industrial users, as well as being included in Federal and
military specifications on brazing filler metals or alloys. It
has a narrow melting range which is not apparent in most brazing
operations, making it flow freely through a capillary.
PROPERTIES
OF BRAZED JOINTS:
Generally, the joint strength using Silvaloy 50 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 operating temperature
for Silvaloy 50 is up to 400°F in continuous service and up to
600°F in intermittent service. Where improved corrosion resistance
is needed, Silvaloy A-50N and Silvaloy A-40N2 are recommended
over silver base filler metals not containing nickel.
APPLICATIONS:
Typical applications are the joining of ferrous, nonferrous and
dissimilar metals and alloys with close joint clearances.
| SPECIFICATIONS: |
|
| AWS
A5.8 |
BAg-1a |
| ASME |
BAg-1a |
| QQ-B-654 |
Grade
IV |
| AMS |
4770 |
| MIL-B-15345
|
Grade
IV |
SAFETY INFORMATION:
Silvaloy 50 contains cadmium and therefore upon heating may produce
toxic fumes. 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 of 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
50.
AVAILABLE
FORMS:
Standard forms of Silvaloy 50 are wire, strip, and preforms.
|
|
