|
| Silvaloy
A-56T (BAg-7) |
|
| Nominal
Composition: |
|
|
| Silver |
|
56.0
± 1.0% |
| Copper |
|
22.0
± 1.0% |
| Zinc |
|
17.0
± 2.0% |
| Tin |
|
5.0 ± 0.5% |
| Total
Other Elements |
|
0.15%
Max. |
| Physical
Constants: |
|
|
| Solidus |
|
1145°F
(618°C) |
| Liquidus |
|
1205°F
(652°C) |
| Brazing
Range |
|
1205-1400°F
(652-760°C) |
| Specific
Gravity |
|
9.49 |
| Density
(lb./cu.in.) |
|
5.00 |
| Electrical
Conductivity (% IACS) |
|
11.9 |
| Electrical
Resistivity (Michrohm-cm) |
|
14.5 |
| Color |
|
White |
DESCRIPTION:
Silvaloy A-56T has the lowest brazing temperature,
best wetting, and best flow of all the cadmium-free alloys. It
has a slight plastic range which may be noticed during melting
on some applications. Its low zinc content minimizes problems
due to excessive heating (as in furnace brazing) or due to excessive
heating (as by less skilled operators). For this reason, it is
often preferred over Silvaloy 35, Silvaloy 45, or Silvaloy 50
for furnace brazing, or any brazing operation where the alloy
is molten for an extended period of time. It is often selected
for use on silver or stainless steel due to its excellent color
match. Silvaloy A-56T is often used because it does not cause
stress cracking of nickel, nickel alloys, or stainless steel as
readily as the other low melting alloys. The fact that Silvaloy
A-56T contains no cadmium has led to its use on food handling
equipment where cadmium can be hazardous and its use is prohibited
by law. Operating temperature for Silvaloy A-56T is up to 400°F
in continuous service and up to 600°F in intermittent service.
Where improved corrosion resistance is needed, Silvaloy 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-7 |
| ASME |
BAg-7 |
| QQ-B-654 |
BAg-7
|
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 American National
Standard (ANSI) Z49.1, “Safety in Welding and Cutting”. For more
complete information, refer to the Material Safety Data Sheet
for Silvaloy A-56T.
AVAILABLE
FORMS:
Standard forms for Silvaloy A-56T are wire,
strip, and preforms.
|
|
