AMS 4776
AWS: BNi-1a
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.
Available Forms
Powder and Paste
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
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
Specs
American Welding Society (AWS)
BNi-1a
Solidus
1790 F / 977 C
Liquidus
1970 F / 1077 C
Disclaimer
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.
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