| Silvaloy
A-30 (BAg-20) |
 |
| Nominal Composition: |
|
|
| Silver |
|
30.0±1.0% |
| Copper |
|
38.0±1.0% |
| Zinc
|
|
32.0±2.0% |
| Total
Other Elements |
|
0.15%
Max. |
| Physical Constants: |
|
|
| Solidus |
|
1250°
(675°C) |
| Liquidus |
|
1410°F
(765°C) |
| Brazing
Range |
|
1410-1575°F(765-856°C) |
| Specific
Gravity |
|
8.85 |
| Density
(T.oz./cu.in.) |
|
4.66 |
| Electrical
Conductivity (% IACS) |
|
24.4 |
| Color |
|
Light
Yellow |
DESCRIPTION:
Silvaloy A-30 does not contain cadmium and is often used as an
alternate to cadmium containing alloys when the brazed assembly
comes in contact with food or dairy products. Its slightly higher
melt temperature provides improved mechanical strengths when exposed
to elevated temperatures. It is used extensively in joining of
copper, brass, nickel-silvers, and ferrous alloys.
PROPERTIES
OF BRAZED JOINTS:
Generally, the joint strength using Silvaloy A-30 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 A-30 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-20 |
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 America 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
A-30.
AVAILABLE
FORMS:
Standard forms of Silvaloy A-30 are wire, strip, and preforms.
|
