SAE AMS 2772 Alloy – Composition, Properties, and Uses

SAE AMS 2772 Alloy – Composition, Properties, and Uses

Materials science is an essential field of study involving materials’ physical and chemical behaviour. A particular material that has gained popularity in this field is SAE AMS 2772. This specification outlines the requirements for a specific manganese bronze alloy commonly used in aerospace applications. Please keep reading to learn about AMS 2772’s composition, properties, and applications.

What is AMS 2772?

SAE AMS 2772 is a specification that outlines the guidelines for the thermal diffusion of aluminium coatings onto various steel and titanium alloys. It is the industry standard manufacturers use in the aerospace, defence, and other high-tech industries. By following these guidelines, manufacturers can ensure the performance and reliability of their products. The process involves heating the metal to a high temperature while exposing it to a gas containing aluminium. The aluminium then diffuses onto the surface of the metal to create a hard, wear-resistant coating. This process is crucial for the longevity and durability of parts subject to wear and corrosion. The result is a product that can withstand extreme conditions and operate at peak performance.

AMS 2772 Composition

AMS 2772 is a specific type of bronze alloy that contains between 57-62% copper, 0.3-3% iron, 0.3-1.2% aluminium, 2.6-3.6% manganese, 0.3-1.2% nickel, and 0.1-0.5% silicon. The alloy’s composition can vary slightly depending on its intended use, but it typically meets the requirements of the AMS 2772 specification.

AMS 2772 Physical Properties

SAE AMS 2772 exhibits good wear and corrosion resistance, making it ideal for aerospace applications. It has a relatively low coefficient of friction, which reduces wear and tear on mechanical components. Additionally, it has excellent resistance to seawater corrosion, making it an ideal choice for marine applications.

AMS 2772 Mechanical Properties

SAE AMS 2772 is a high-strength bronze alloy that is well-suited for use in high-load applications. It has a tensile strength between 1050-1150 MPa and a yield strength between 600-650 MPa. Additionally, the alloy has good ductility and can withstand repeated bending and forming without cracking or breaking.

AMS 2772 Uses

SAE AMS 2772 is most commonly used in aerospace applications, where it is used to manufacture components for aircraft and spacecraft. It is also used in marine applications, such as shipbuilding and offshore drilling. Other uses include electrical connectors, bushings, and bearings.

AMS 2772 Hardness

AMS 2772 has a relatively high hardness, making it ideal for use in applications requiring high strength and wear resistance. Its hardness typically ranges from 210-260 HB, making it harder than other materials commonly used in aerospace applications.

AMS 2772 Heat treatment

AMS 2772 does not require any specific heat treatment. However, it can be heat-treated to improve its strength and hardness. The alloy can be welded using standard techniques, and it responds well to heat treatment processes such as annealing, quenching, and tempering.


AMS 2772 material is a high-strength bronze alloy commonly used in aerospace and marine applications. Its excellent wear and corrosion resistance, high strength, and hardness make it an ideal choice for various mechanical components. If you are looking for a high-performance material that can withstand harsh environments, then AMS 2772 is worth considering.