AMS 4776
AMS 4776 Technical Data
Uses
AMS 4776 is a general purpose nickel brazing alloy which can be used for a wide variety of applications. This alloy is typically used for joining super alloys, stainless steels and alloys requiring good joint strength at high temperature while maintaining good corrosion and oxidation resistant characteristics. Due to the low carbon content AMS 4776 exhibits low carbide precipitation.
Brazing Characteristics
AMS 4776 exhibits good flow characteristics when clearance between 0.002in-0.005in (0.051 mm-0.127mm) are maintained. Minimizing joint clearance and the amount of material applied will limit the amount of erosion into the base metal. In atmosphere brazing, base metals containing more than 0.5% aluminum and/or titanium are often nickel-plated (0.0005inc. to 0.005in. thick depending upon brazing temperature and cycle), if difficulties in wetting and bonding are encountered. On thinner sections or less ductile base metals, brazing should be done at the low end of the brazing range with small clearance, fast heating/cooling cycles and minimum quantity of brazing alloy to minimize erosion.
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design and metallurgical interaction between base metals and filler metal. This alloy shows satisfactory oxidation resistance at temperatures as high as 2000°F
Specifications
AMS 4776 conforms to American Welding Society (AWS) A5.8/A5.8M BNi-1a and Society of Automotive Engineers (SAW) AMS 4776
Available Forms
Powder and Paste
Compare With
- AMS: 4776
- AWS: BNi-1a
- JM: Nickelbraze HTN1A
- Lucas: Handy Hi-Temp 721
- Morgan/Wesgo: Incronibsi-14
- PI: AMS 4776
Specifications
- Brazing Temperature Range High: 2070 F / 1132 C
- Brazing Temperature Range Low: 2020 F / 1104 C
- Liquidus: 1970 F / 1077 C
- Solidus: 1790 F / 977 C
Composition
- Ni: 73.9%
- Cr: 14%
- Fe: 4.5%
- Si: 4.5%
- B: 3.1%
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