ThePipingMart Blog Grades AMS 5893 Incoloy Alloy – Composition, Properties and Uses

AMS 5893 Incoloy Alloy – Composition, Properties and Uses

AMS 5893

Do you work in the aerospace, oil, gas, or military industries? Then, you must have heard about AMS5893. This alloy is considered a high-performance material that can withstand extreme environments. This blog aims to comprehensively understand AMS 5893 – its composition, physical and mechanical properties, hardness, uses, and heat treatment. Keep reading to learn more.

What is AMS 5893?

AMS 5893  (also known as Incoloy 909 Alloy) is an alloy made of iron, nickel, cobalt, and molybdenum. It boasts high strength and corrosion resistance properties making it great for various aerospace applications such as flight control actuators, engine components and landing gear. It has superior fatigue strength compared to other alloys in severe temperatures, making it a fundamental choice for turbine engines in commercial aircraft.

AMS 5893 Composition

AMS5893 is a nickel-based alloy that contains metals such as molybdenum, tungsten, cobalt, chromium, and iron. These metals are added to improve the alloy’s strength, resistance to corrosion and high-temperature environments. The composition of AMS 5893 is closely controlled to ensure consistent, high-quality material for various applications.

Elements Content (%)
Iron, Fe 42
Nickel, Ni 38
Cobalt, Co 13
Niobium, Nb 4.7
Titanium, Ti 1.5
Silicon, Si 0.4
Aluminum, Al 0.03
Carbon, C 0.01

AMS 5893 Physical Properties

AMS 5893 has excellent high-temperature strength and stress rupture properties. Its melting point is around 2,400°F, and it can withstand temperatures up to 1,800°F. This alloy also has good resistance to oxidation and corrosion in environments containing sulfidation and hot gases. AMS 5893’s density is around 0.298 lb/in^3.

Properties Metric Imperial
Density 8.30 g/cm³ 0.300 lb/in³
Melting point 1422°C 2590°F

AMS 5893 Mechanical Properties

AMS 5893 has outstanding mechanical properties, making it a popular material in high-stress environments. It has a tensile strength of 180 ksi and a yield strength of 95 ksi at 1,800°F. This nickel-based alloy can also maintain its mechanical properties in high-temperature situations. For example, at 1,600°F, its tensile strength is around 110 ksi.

Properties Metric Imperial
Tensile strength (precipitation hardened. value at room temperature) 1300 MPa 189000 psi
Yield strength (@ strain 0.200%, precipitation hardened, value at room temperature) 1140 MPa 165000 psi
Elongation at break (precipitation hardened) 15% 15%

AMS 5893 Thermal Properties

Properties Metric Imperial
Thermal expansion co-efficient (@ 20-427°C/68-801°F) 7.70 µm/m°C 4.28 µin/in°F
Thermal conductivity 14.8 W/mK 103².°F

AMS 5893 Uses

Due to its exceptional mechanical and physical properties, AMS 5893 is used in several industries. It is a common material in the aerospace and gas turbine industries, where it is used in combustors, afterburner parts, and gas turbine exhaust systems. This material is also used in chemical processing plants to resist corrosive environments. Additionally, AMS 5893 is used in military equipment, such as missile systems and rocket motors.

AMS 5893 Hardness

AMS 5893 can be heat-treated to achieve different hardness levels based on the required application. The alloy’s hardness ranges from 20 HRC to 40 HRC. Hardness is a critical factor in determining the suitability of a material for specific applications. However, the hardness level of AMS 5893 does not affect its high-temperature strength.

AMS 5893 Heat Treatment

Heat treatment is crucial in optimizing AMS 5893’s mechanical properties. This alloy can be hardened by special techniques such as solution annealing and ageing. Solution annealing involves heating the material above its critical temperature, soaking it for a specific time, and then quenching it. On the other hand, ageing consists in heating the alloy below its critical temperature and holding it for an extended period. This process enhances the material’s strength, ductility, and resistance to fatigue.


AMS 5893 material is a nickel-based alloy with exceptional properties ideal for extremely high-temperature environments. Its composition, physical and mechanical properties, hardness, uses, and heat treatment have been extensively covered in this blog. By understanding these aspects, engineers and manufacturers can select suitable materials for their applications, ensuring optimal performance and durability.

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AMS 5893 Incoloy Alloy – Composition, Properties and Uses

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