#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

Download SDS Sheet

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.

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