ThePipingMart Blog Grades AMS 5771 Nickel Alloy – Composition, Properties and Uses

AMS 5771 Nickel Alloy – Composition, Properties and Uses

AMS 5771

AMS 5771 is a type of stainless steel widely used in various industries due to its excellent properties. But what exactly is this material, and why is it highly sought after? In this blog post, we will unravel the mysteries behind AMS 5771 by discussing its composition, physical and mechanical properties, uses, and heat treatment.

What is AMS 5771?

AMS 5771 is a specification developed by the Society of Automotive Engineers to ensure the quality and reliability of stainless steel alloys used in critical aerospace and industrial applications. This specification outlines the chemical composition, mechanical properties, and testing methods required to produce high-performance stainless steel alloys. With its rigorous standards, AMS5771 provides a benchmark for manufacturers and engineers in the aerospace and industrial sectors to create materials that can withstand extreme conditions and operate consistently under challenging environments.

AMS 5771 Composition

AMS 5771 is a type of martensitic stainless steel with a chemical composition of 0.08% carbon, 1.00% manganese, 0.035% phosphorus, 0.030% sulfur, 0.60% silicon, 11.50-13.50% chromium, and 1.00-2.00% nickel. It also contains a small amount of molybdenum and nitrogen, which enhances its corrosion resistance and strength.

AMS 5771 Physical Properties

AMS 5771 has a density of 7.80 g/cm3 and a melting point of 1400-1450°C. It has a tensile strength of 690 MPa and a yield strength of 520 MPa, making it suitable for highly demanding applications. It also has good flexibility and toughness, allowing it to resist crack propagation under stress.

AMS 5771 Mechanical Properties

AMS 5771 exhibits excellent hardness, with a typical value of between 40 and 48 HRC. Its wear resistance is also impressive, making it ideal for high durability and long-term performance applications. Additionally, AMS 5771 has good machinability and weldability, making it easy to work with and suitable for various fabrication processes.

AMS 5771 Uses

Thanks to its outstanding properties, AMS 5771 finds use in various applications, including the oil and gas, aerospace, and automotive industries. It is commonly used to manufacture hardening parts, pumps, and valve parts, along with numerous other applications that demand high corrosion resistance, hardness, and wear resistance.

AMS 5771 Heat treatment

Heat treatment is crucial to enhance AMS 5771’s mechanical properties. This material’s most commonly used heat treatment process is quenching and tempering. This process involves heating the material to a high temperature and then rapidly cooling it in a quenching medium such as oil or water. Afterwards, the material is tempered by reheating to a lower temperature to relieve internal stresses and improve its ductility and toughness.


AMS 5771 material is a high-performance martensitic stainless steel with exceptional hardness, strength, and corrosion resistance. Its excellent properties make it a popular choice for many applications, including those that require high durability, such as the oil and gas, aerospace, and automotive industries. By understanding its composition, physical and mechanical properties, uses, and heat treatment, we can appreciate the versatility of this material and its importance in various industrial sectors.

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