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AMS 4782

AMS 4782 Technical Data


AMS 4782 composition makes it suitable for the brazing of nickel, chromium, or iron base metals. Some of the applications for this filler metal are highly stressed sheet metal components, jet engine parts, and assemblies used in corrosive conditions.  It’s similar to BNi-1, but it is boron free, making it suitable for certain nuclear applications.

Brazing Characteristics

With its high silicon content, AMS 4782 / AWS BNi-5 is a good choice for narrow, deep joints or for honeycomb components. The high chrome content is a plus for components that will endure corrosive or oxidating service conditions.  When wetting to base metals which contain higher Al or Ti content in an inert atmosphere, nickel plating of the base metal is recommended.  Dry reducing atmospheres or inert atmospheres are recommended.  

Properties of Brazed Joints

The properties of a brazed joint are dependent upon the base metal, joint design and brazing technique. For atmospheric brazing the recommended radial joint clearance for nickel-base alloys fall within .000-.002” range for atmosphere brazing.


AMS 4782 conforms to American Welding Society (AWS) A5.8/A5.8M BNi-5 and Society of Automotive Engineers (SAE) AMS 4782

Available Forms

Powder, paste and transfer tape to customer specifications

Compare With

  • AMS: 4782
  • AWS: BNi-5
  • EN: NI 105
  • PI: AMS 4782
  • UNS: N99650


  • Brazing Temperature Range High: 2175 F / 1191 C
  • Brazing Temperature Range Low: 2125 F / 1163 C
  • Liquidus: 2075 F / 1135 C
  • Solidus: 1975 F / 1079 C



  • Ni: 71%
  • Cr: 19%
  • Si: 10%

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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