| Silvaloy
18M |
 |
| Nominal
Composition: |
|
|
| Silver |
|
18.0
± 1.0% |
| Phosphorus |
|
6.25 ± 0.25% |
| Copper
|
|
Balance |
| Total
Other Elements |
|
0.15%
Max. |
| Physical
Constants: |
|
|
| Solidus |
|
1190°F
(645°C) |
| Liquidus |
|
1235°F
(665°C) |
| Brazing
Range |
|
1225-1350°F
(663-732°C) |
| Specific
Gravity |
|
8.35 |
| Density
(lb/cu in) |
|
0.302 |
| Electrical
Conductivity (% IACS) |
|
6.0 |
| Electrical
Resistivity (Michrohm-cm) |
|
29.0 |
| Color |
|
Light
Copper |
DESCRIPTION:
Silvaloy 18M is a ternary alloy of silver,
phosphorus, and copper approaching the eutectic composition. It
is very fluid at brazing temperature and should be used on well
fitted joints. Silvaloy 18M low brazing temperature and narrow
solidus-liquidus range makes it ideal for applications where temperature
is a factor and with slow heating rates, such as in furnace brazing.
PROPERTIES
OF BRAZED JOINTS:
Generally, the joint strength using Silvaloy
18M will surpass the strengths of the base metals. Strength is
a function of the base metals being joined, design of joint. joint
clearance and brazing procedures. The maximum operation temperatures
for Silvaloy 18M are 400°F (continuous service) and 500°F (short
time service). Corrosion resistance is satisfactory except when
the joint is in contact with sulfurous atmosphere (especially
at elevated temperatures).
APPLICATIONS:
Silvaloy 18M is used for joining of copper
and copper alloys, such as brass or bronze. It is suitable for
use on silver, tungsten, and molybdenum. It should not be used
on ferrous or nickel alloys. On copper to copper applications,
it is self-fluxing due to the fluxing action of the phosphorus
content. It’s low melting temperature makes it ideal for application
on copper to brass where temperature and dezincification is a
factor.
SAFETY
INFORMATION:
The operation and maintenance of brazing
equipment or facility should conform to the provisions of American
National Standard ANSI/ASC Z49.1, “Safety in Welding, Cutting,
and Allied Processing”. For more complete information, refer to
the Material Safety Data Sheet for Silvaloy 18M.
AVAILABLE
FORMS:
Standard forms of Silvaloy 18M are wire
and preforms.
|
