ThePipingMart Blog Grades AMS 5920 Cobalt Alloy – Composition, Properties, and Uses

AMS 5920 Cobalt Alloy – Composition, Properties, and Uses

AMS 5920

AMS 5920 is a type of alloy steel that has gained popularity in various industries due to its exceptional properties and characteristics. It is designed to offer excellent corrosion resistance, high strength, and durable performance under different environmental conditions. This comprehensive guide will explore what AMS 5920 is, its composition, physical and mechanical properties, uses hardness, and heat treatment.

AMS 5920 Composition

AMS 5920 is a type of low-alloy steel that primarily contains iron, carbon, and a specific combination of alloying elements such as nickel, chromium, and molybdenum. The composition is carefully formulated to offer superior strength while maintaining excellent corrosion resistance properties. It also contains small amounts of silicon, manganese, phosphorus, sulfur, and copper to improve its overall properties.

AMS 5920 Physical Properties

AMS 5920 has impressive physical properties, making it an ideal material for various applications. The alloy has a 7.85 g/cm3 density and a melting point of 1427°C. Furthermore, it exhibits excellent thermal expansion, thermal and electrical conductivity, making it suitable for high-temperature environments.

AMS 5920 Mechanical Properties

The mechanical properties of AMS 5920 are exceptional. It offers high strength and excellent toughness properties, making it ideal for use in critical applications such as the aerospace industry. AMS 5920 also offers excellent fatigue resistance, impact resistance, and high-temperature strength. Additionally, it has a low coefficient of thermal expansion that makes it resistant to thermal shock and cycling.

AMS 5920 Uses

AMS 5920 is used in various industries for different applications. Its high strength and superior corrosion resistance properties make it ideal for use in the aerospace, automotive, and chemical processing industries. It also manufactures compressor disks, turbine blades, shafts, and gears. Furthermore, it is used to produce rocket motor cases and high-pressure vessels.

AMS 5920 Hardness

AMS 5920 has impressive hardness properties, making it ideal for use in various applications that require high strength and wear resistance. The material is heat-treated to achieve different hardness levels between 250-300 Brinell hardness. The high hardness properties of AMS 5920 make it resistant to abrasion, erosion, and scratching.

AMS 5920 Heat treatment

Heat treatment is essential for AMS 5920 to achieve optimal mechanical properties. The material is heated to 830-860°C and then cooled rapidly in water or oil. This process results in optimal strength properties, high wear resistance, and flexibility. Furthermore, the heat treatment process can be modified to produce specific properties such as increased toughness or improved machinability.


In conclusion, AMS 5920 is an exceptional alloy steel with superior strength, corrosion resistance, and durability properties. The carefully formulated composition and heat treatment process make it suitable for high strength and wear resistance applications. Understanding the properties and characteristics of AMS 5920 is essential in selecting the suitable material for your application needs.

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