ThePipingMart Blog Grades AMS 5871 Incoloy Alloy – Composition, Properties, and Uses

AMS 5871 Incoloy Alloy – Composition, Properties, and Uses

AMS 5871

AMS 5871 is a type of steel often used in high-stress applications for its high strength, wear, and fatigue resistance. The material is often used for aerospace structural components, precision components, and high-performance racing parts. This blog post will discuss the composition, physical and mechanical properties, uses, hardness, and heat treatment of AMS5871 to help you understand more about this material.

What is AMS 5871?

AMS 5871 (also known as Incoloy 800H Alloy) is a type of high-performance alloy commonly used in aerospace engineering. AMS 5871 is hailed for its exceptional strength, durability, and resistance to high temperatures and corrosion. This makes it an ideal material for various applications, from jet engine parts to medical devices. But what sets AMS 5871 apart from other alloys on the market is its unique combination of properties, specifically designed to meet the rigorous demands of the aerospace industry.

AMS 5871 Composition

AMS 5871 is a wrought precipitation-hardened stainless steel alloy. It comprises iron, nickel, chromium, copper, and titanium. The minimal nickel content in this alloy improves the stability of the material at high temperatures, while the addition of copper enhances the strength and corrosion resistance of the material. Titanium in the alloy forms carbide precipitates, making it more wear-resistant than other stainless steel types.

Element Content (%)
Iron, Fe ≥39.5
Nickel, Ni 30-35
Chromium, Cr 19-23
Manganese, Mn ≤1.5
Others Remainder

AMS 5871 Physical Properties

AMS 5871 has a density of 0.282 lbs/in³ and a melting point of 2345-2460°F. It exhibits good electrical and thermal conductivity, high-temperature strength, and ductility. The material has good machinability properties and can be formed into various shapes and sizes through different heat treatment processes.

Properties Metric Imperial
Density 7.94 gm/cm3 0.287 lb/in3

AMS 5871 Mechanical Properties

AMS 5871 has a minimum tensile strength of 210,000 psi and a minimum yield strength of 185,000 psi, which means it is incredibly strong. The material has excellent fatigue resistance even under high cyclic stresses, making it perfect for high-stress applications. The material also exhibits excellent ductility and toughness, even after exposure to extreme conditions.

Properties Metric Imperial
Tensile strength(annealed) 600 MPa 87 ksi
Yield strength(annealed) 275 MPa 39.9 ksi
Elongation at Break 45% 45%

AMS 5871 Uses

AMS 5871 has a wide range of applications due to its high strength, resistance to wear and fatigue, and excellent corrosion resistance. It is popularly used in aerospace and racing applications in the form of engine components, brake callipers, and suspension components. The material is also used in precision components, chemical processing equipment, and surgical instruments due to its biocompatibility.

AMS 5871 Hardness

AMS 5871 has a hardness of approximately 40 HRC in its precipitation-hardened state. The hardness can be further increased through secondary heat treatment, enhancing strength and toughness.

AMS 5871 Heat Treatment

AMS 5871 can be heat treated to increase its hardness and strength. The two most common heat treatments for AMS 5871 are solution treatment and precipitation hardening. Solution treating involves heating the material to a high temperature and then cooling it rapidly, followed by precipitation hardening to increase the hardness. Precipitation hardening consists in heating the material at a lower temperature to promote the formation of carbide precipitates, which increases the hardness and strength of the material.


AMS 5871 is a precipitation-hardened stainless steel alloy used in high-stress applications due to its high strength, fatigue, and wear resistance. It has excellent corrosion resistance and machinability properties, making it suitable for various precision components, chemical processing equipment, aerospace components, racing parts, and surgical instruments. The material can be heat treated to enhance strength and hardness and increase its toughness and ductility levels. Now that you have a deeper understanding of AMS 5871, you can make informed decisions when selecting materials for your applications.

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AMS 5871 Incoloy Alloy – Composition, Properties, and Uses

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