#A-40T
#A-40T is a good general purpose, low melting, cadmium-free brazing alloy, often selected for its low temperature, wetting and good flow. #A-40T has a lower brazing temperature with a relatively narrower melting range than other cadmium-free classifications with similar silver content. This alloy is particularly useful for joining steel, copper and copper alloys. It has proven most suitable for torch brazing with manual feeding into a joint where heating may not be consistent. It is also suitable for preplacing as a ring or punching. It does not liquidate excessively if heated slowly through its melting range.
Specifications
| Melting Pt. | 1200 ºF 650 ºC |
| Flow Pt. | 1310 ºF 710 ºC |
| MBT1 | 1475 |
| AWS A5.8 | BAg-28 |
| ASME | BAg-28 |
| AMS | 4772 |
| Resale Options | Brazing Paste Brazing Rod Brazing Strip Brazing Wire |
| Preform Options | Brazing Discs Brazing Rings Brazing Washers Custom Designs Cut-Offs Edgewounds |
| Approx. Wire Length (BCuP/lb.) (BAg/Tr.oz) | 275 in @ 0.031 diameter 30 in @ 0.093 diameter 65 in @ 0.062 diameter |
Physical Constants
| Solidus | 1200 ºF 649 ºC |
| Liquidus | 1310 ºF 710 ºC |
| Liquidus | 1310 to 1550 ºF 618 to 760 ºC |
| Specific Gravity | 9.03 |
| Density | 4.76 T.oz./cu.in. |
| Electrical Conductivity | 18 % IACS |
| Electrical Resistivity | 9.60 Micro ohm-cm |
| Color | Pale Yellow |
Applications
Typical applications are the brazing of ferrous, nonferrous and dissimilar metals and alloys with close joint clearances.
Intermediate melt temperatures of the tin containing family. Used in brazing ferrous and non ferrous.
Available Forms
Standard forms of Brazeit #A-40T are brazing wire and brazing preforms.
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 #A-40T.
Downloads
Bellman-Melcor distinguishes itself as a provider of premium quality brazing alloys at industry competitive prices. Our extensive inventory of brazing and soldering alloys ensures that in most cases your order can be available for immediate delivery.
Compare With
- AWS: BAg-28
- EN: AG 105
- Lucas: Silvaloy 402
- PI: Silver Braze 40Sn2
- UNS: P07401
Specifications
- Brazing Temperature Range High: 1410 F / 766 C
- Brazing Temperature Range Low: 1360 F / 738 C
- Liquidus: 1310 F / 710 C
- Solidus: 1200 F / 649 C
Composition
- Ag: 40%
- Cu: 30%
- Zn: 28%
- Sn: 2%
The information and recommendations contained in this publication have been provided without charge & compiled from sources believed to be reliable and to represent the best information available on the subject at the time of issue. No warranty, guarantee, or representation is made by the Prince and Izant Company, Inc. as to the absolute correctness or sufficiency of any representation contained in this and other publications; Prince and Izant Company, Inc. assumes no responsibility in connection therewith; nor can it be assumed that all acceptable safety measures are contained in this and other publications, or that other or additional measures may not be required under particular or exceptional conditions or circumstances. The company and product names referenced herein are for identification purposes only. All trademarks and registered trademarks are the property of their respective owners.