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.
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
Foil, powder, tape and preforms to customer specifications
- 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%
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