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Silver Braze 40Sn2

Silver Braze 40Sn2 Technical Data


Silver Braze 40Sn2 is a good general purpose, cadmium-free intermediate temperature brazing filler metal for joining steels, copper, copper alloys and nickel alloys. Silver Braze 40Sn2 is commonly used in refrigeration work and plumbing but can be used in the construction, electronics and autmotive manufacturing industries.

Brazing Characteristics

Silver Braze 40Sn2 is a free-flowing, intermediate filler metal and as such is a good substitute for cadmium-bearing filler metals with similar silver contents. Silver Braze 40Sn2 is a free-flowing, gap filling brazing alloy often chosen for its lower temperature. The materials is best suited for narrow gap situations (0.001”-0.005” radial joint clearance). Flux should be used with Silver Braze 40.

Properties of Brazed Joints

The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal. 

  Tensile Strength (lbs/in2)

Elongation(%in 2in.)

Copper 28,000-33,000 25-35
Brass 35,000-45,000  15-30
Low Carbon Steel 55,000-65,000  8-13
304 Stainless Steel 80,000-85,000 2-5


Silver Braze 40Sn2 conforms to American Welding Society (AWS) A5.8/A5.8M BAg-28

Available Forms

Silver Braze 40Sn2 is available in wire, strip, engineered preforms, specialty preforms per customer specification, powder and paste.

Compare With

  • AWS: BAg-28
  • EN: AG 105
  • Lucas: Silvaloy 402
  • PI: Silver Braze 40Sn2
  • UNS: P07401


  • 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



  • 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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