|
| Silvaloy
35 (AWS BAg-2) |
|
| Nominal Composition: |
|
|
| Silver |
|
35.0
± 1.0% |
| Copper |
|
26.0
± 1.0% |
| Zinc |
|
21.0
± 2.0% |
| Cadmium |
|
18.0 ± 1.0% |
| Total
Other Elements |
|
0.15%
Max. |
| Physical Constants: |
|
|
| Solidus |
|
1125°F
(607°C) |
| Liquidus |
|
1295°F
(702°C) |
| Brazing
Range |
|
1295-1550°F
(702-843°C) |
| Specific
Gravity |
|
9.29 |
| Density
(T.oz./cu.in.) |
|
4.90 |
| Electrical
Conductivity (% IACS) |
|
27.5 |
| Electrical
Resistivity (Michrohm-cm) |
|
6.26 |
| Color |
|
Light
Yellow |
DESCRIPTION:
Silvaloy 35 is an alloy with a melting range suitable for brazing
steel, stainless steel, copper, copper alloys, nickel, nickel
alloys or combinations of these metals. Silvaloy 35 is free-flowing
and suited for general purpose work. Its broader melting range
is helpful where clearances are not uniform. During melting, Silvaloy
35 passes from the solid state to a mushy or plastic state and
progressively to a liquid. If heated slowly through this plastic
state (1125-1295°F), the liquid portion may flow from the solid
portion. This causes a separation of the alloy into a low-temperature
melting (fluid) portion and a high-temperature melting (solid)
portion. This phenomenon is called liquation. The high-temperature
melting portion will melt only above the normal brazing temperature
of Silvaloy 35. For this reason, Silvaloy 35 should be heated
rapidly through the melting range.
PROPERTIES
OF BRAZED JOINTS:
Generally, the joining strength using Silvaloy 35 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,
joint clearances, and brazing procedures. The recommended maximum
operating temperature for Silvaloy 35 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 close joint clearances.
| SPECIFICATIONS: |
|
| MIL-B-15395 |
Grade
VIII |
| AWS
A5.8 |
BAg-2 |
| ASME |
BAg-2 |
| QQ-B-654 |
GRADE
VIII |
| AMS
|
4768 |
SAFETY INFORMATION:
Silvaloy 35 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 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 on Silvaloy
35.
AVAILABLE
FORMS:
Standard forms of Silvaloy 35 are wire, strip, and preforms.
|
|
