SilverAlloy A-40T
Nominal Chemical
Composition
INTRODUCTION
Aufhauser SilverAlloy A-40T is a good general all-purpose brazing alloy. It has a lower brazing temperature with a narrower melting range than other cadmium-free classifications with similar silver content. Often chosen for its superior wetting and flow characteristics, A-40T is suitable for torch brazing where heating may not be consistent. Also appropriate for pre-placement in the joint. It will not liquidate excessively if heated slowly.
APPLICATIONS
Aufhauser SilverAlloy A-40T is used for joining steel, copper and copper alloys with close joint clearances.
GENERAL INFORMATION
Chemical Composition| Silver | Copper | Zinc | Tin |
|---|---|---|---|
| 39.0-41.0 | 29.0-31.0 | 26.0-30.0 | 1.5-2.5 |
ADDITIONAL INFORMATION
Generally, the joint strength using SilverAlloy A-40T will surpass the strengths of the base metals being joined, type of joint, design of joint, joint clearances and brazing procedures. The recommended maximum operating temperature for SilverAlloy A-40T is up to 400°F in continuous service and up to 600°F in intermittent service. Where improved corrosion resistance is needed, SilverAlloy A-50Ni2 and SilverAlloy A-40Ni2 are recommended over silver base filler metals not containing nickel.
PHYSICAL and MECHANICAL PROPERTIES
| Solidus | 1200°F (649°C) |
| Liquidus | 1310°F (710°C) |
| Brazing Range | 1310-1550°F (710-843°C) |
| Specific Gravity | 9.03 |
| Density | 4.76 TO/Cu.In |
| Electrical Conductivity | 18.0 %IACS |
| Electrical Resistivity | 9.60 μohm-cm |
| Color | Light Yellow |
SPECIFICATIONS MEET or EXCEED |
| AWS A5.8 BAg-28 |
| ISO 3677: B Ag 40 Cu Zn Sn 640-680 |
| UNS P07401 |
| DIN 8513 L-Ag40 Sn |
AVAILABLE FORMS |
| Powder/Paste |
| Wire, Rods*, Foil |
| Specialty preforms per customer specifications |
*STANDARD SIZES AND DIAMETERS |
| Diameters: 1/32", 3/64", 1/16", 3/32", 1/8" |
| Sizes: 1, 3, 5, or 50 troy ounces |
| Lengths: 18, 20, or 36 inches |