| Silvaloy
0 (BCuP-2) |
 |
| Nominal
Composition: |
|
|
| Phosphorus |
|
7.25 ± 0.25% |
| Copper
|
|
Balance |
| Total
other elements |
|
0.15%
Max. |
| Physical
Constants: |
|
|
| Solidus |
|
1310°F
(710°C) |
| Liquidus |
|
1460°F
(793°C) |
| Brazing
Range |
|
1350-1550°F
(732-843°C) |
| Specific
Gravity |
|
8.00 |
| Density
(lb/cu in) |
|
0.289 |
| Electrical
Conductivity (% IACS) |
|
7.5 |
| Electrical
Resistivity (Michrohm-cm) |
|
23.2 |
| Color |
|
Copper
Yellow |
DESCRIPTION:
Silvaloy 0 is used for the brazing of copper
and copper alloys, brass and bronze. It can also be used on silver,
tungsten and molybdenum. It is primarily used for the joining
of copper-to-copper on vibration free joints. It is very effective
for joining tight fitting copper pipe and tubing. Silvaloy 0 should
not be used on ferrous metals or copper alloys containing more
than 10% nickel because of phosphorus embrittlement due to reactions
with iron or nickel. Silvaloy 0 is extremely fluid at brazing
temperatures and will penetrate joints with very little clearance.
Best results are obtained with clearances of .001-.003”. Melting
of Silvaloy 0 is virtually complete at 1350°F (732°C). Best results
are obtained when brazing slightly above this temperature.
PROPERTIES
OF BRAZED JOINTS:
Generally, the joint strength using Silvaloy
0 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 temperatures for Silvaloy 0 are 300°F (continuous
service) and 400°F (short time service). Corrosion resistance
is satisfactory except when the joint is in contact with sulfurous
atmosphere (especially at elevated temperatures).
APPLICATIONS:
The phosphorus content of Silvaloy 0 acts
as fluxing agent and no flux is necessary when brazing copper
joints. However, when used with a copper alloy or one of the other
brazeable metals, a brazing flux must be used to promote wetting,
bonding, and flow throughout the joint. The flow point of Silvaloy
0 is 1350°F (732°C).
| SPECIFICATIONS: |
|
AWS
A5-8
|
BCuP-2 |
| ASME |
BCuP-2 |
| QQ-B-650
|
BCuP-2 |
SAFETY
INFORMATION:
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 0.
AVAILABLE
FORMS:
Standard forms of Silvaloy 0 are wire and
preforms.
|
