Primarily used for the joining of tungsten carbide to steel, this alloy also offers good wetting characteristics on stainless steel, tool steels and nickel alloys. the 3% nickel content provides good corrosion resistance.

#50 is one of the lower melting brazing alloys composed of silver, copper, zinc and cadmium. It is suitable for use on most metals except aluminum and magnesium. It is used for joining steel, stainless steel, copper, copper alloys, nickel, nickel alloys or combinations of these metals. It has wide acceptance by industrial users, as well as being included in Federal and military specifications on brazing alloys. It has a narrow melting range which is not apparent in most brazing operations, making it flow freely through a capillary.


Melting Pt. 1160 ºF
627 ºC
Flow Pt. 1175 ºF
635 ºC
MBT1 1400
AWS A5.8 BAg-1a
AMS 4770
QQ-B-654 Grade IV
MIL-B-15345 Grade IV
Preform Options Brazing Discs 
Brazing Rings 
Brazing Washers 
Resale Options Brazing Rod 
Brazing Strip 
Brazing Wire
Approx. Wire Length (BCuP/lb.) (BAg/Tr.oz) 260 in; 0.031 diameter 
28 in; 0.093 diameter 
65 in; 0.062 diameter

Physical Constants

Solidus 1160 ºF
627 ºC
Liquidus 1175 ºF
635 ºC
Brazing Range 1200 to 1400 ºF
648 to 760 ºC
Specific Gravity 9.45
Density 4.98 T.oz./cu.in.
Electrical Conductivity 23.9 % IACS
Electrical Resistivity 7.00 Micro ohm-cm
Color Light Yellow


Typical applications are the brazing of ferrous, nonferrous and dissimilar metals and alloys close joint clearances.

Similar to Sil. 45 properties with narrower melt range. Used on some base metals.

Safety Information

#50 contains cadmium and therefore upon heating may produce toxic fumes. 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 of 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 #50.


Standard forms of #50 are brazing wire, brazing strip and brazing preforms.


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

  • AMS: 4770
  • AWS: BAg-1a
  • EN: AG 301
  • Lucas: Eays-Flo
  • PI: Silver Alloy 50
  • UNS: P07500


  • Brazing Temperature Range High: 1275 F / 691 C
  • Brazing Temperature Range Low: 1225 F / 663 C
  • Liquidus: 1175 F / 635 C
  • Solidus: 1160 F / 627 C



  • Ag: 50%
  • Cd: 18%
  • Zn: 16.5%
  • Cu: 15.5%

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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