ThePipingMart Blog Grades AMS 5595 Stainless Steel – Composition, Properties, and Uses

AMS 5595 Stainless Steel – Composition, Properties, and Uses

AMS 5595

AMS 5595 is a popular material used for years in various industries worldwide. This material is known for its strength and reliability, which makes it an ideal choice for different applications. Despite its widespread use, many people still need to become more familiar with it. In this blog post, we will explore the composition, physical and mechanical properties, and uses of AMS 5595. We will also delve into its hardness and heat treatment processes. By the end of this post, you will better understand AMS 5595 and its importance in the industry.

What is AMS 5595?

AMS 5595, (also known as Stainless Steel – Grade 21-6-9) in the world of aviation, is a specification that plays a vital role in ensuring the safety of both passengers and pilots. This specification sets standards for manufacturing high-temperature, corrosion-resistant alloys commonly used in aircraft engines and other critical aerospace components. AMS5595 is known for its durability and high-temperature resistance, making it suitable for some of the most demanding aerospace applications. Whether a commercial airline or a military aircraft, AMS 5595 is the go-to specification for companies prioritizing safety and quality.

AMS 5595 Composition

AMS 5595 has a chemical composition of nickel-chromium-cobalt-molybdenum. It also contains small amounts of titanium, aluminium, and boron. The exact composition may vary depending on the manufacturer, but it generally contains around 15% chromium, 15% cobalt, and 5% molybdenum. This material has a high nickel content of around 35%, which gives it excellent corrosion resistance.

Element Content (%)
Iron, Fe 64
Chromium, Cr 20
Manganese, Mn 9
Nickel, Ni 6
Silicon, Si 1
Nitrogen, N 0.23
Carbon, C 0.080
Phosphorous, P 0.060
Sulfur, S 0.030

AMS 5595 Physical Properties

AMS 5595 has a density of 8.14 g/cm3, a melting point of 1330°C, and a thermal conductivity of 12.3 W/mK. It also has a low coefficient of thermal expansion, which makes it ideal for applications that require temperature stability. This material has a high oxidation resistance and is known for its excellent mechanical strength.

Properties Metric Imperial
Density 7.83 g/cm3 0.283 lb/in³

AMS 5595 Mechanical Properties

AMS 5595 material can be used in applications that require high strength, particularly in extreme temperatures. It has a tensile strength of around 1075 MPa, yield strength of around 630 MPa, and an elongation of around 15%. It also has a high fatigue strength and can withstand cyclic loading without cracking.

Properties Metric Imperial
Tensile strength, ultimate 883 MPa 128000 psi
Tensile strength, yield (@0.2%) 745 MPa 108000 psi
Elongation at break (in 50 mm) 56% 56%
Modulus of elasticity (typical for stainless steel) 200 GPa 29000 ksi
Machinability (based on 100 machinability for AISI 1212 steel) 30 30

AMS 5595 Uses

AMS 5595 is widely used in aerospace, marine, and chemical processing industries. It is commonly used in gas turbine engine components, such as compressors and high-pressure turbine disks. It is also used in valves, fittings, and fasteners, particularly in high-temperature and high-stress applications. AMS 5595 can be used in exhaust systems, heat exchangers, and chemical processing equipment.

AMS 5595 Hardness

AMS 5595 has a hardness of around 300 HV. This measures its resistance to deformation, an important property for materials subjected to wear and tear. To improve the hardness of AMS 5595, it can be subjected to heat treatment processes such as annealing, solution treatment, and ageing.

AMS 5595 Heat Treatment

AMS 5595 can be heat treated to improve its mechanical properties. Annealing is a process that involves heating the material to a specific temperature and then cooling it slowly to improve its ductility. Solution treatment involves heating the material to a high temperature and then quenching it in water or oil to improve its strength and hardness. Ageing involves heating the material at a lower temperature to further improve its strength and hardness.


AMS 5595 material is a popular material known for its strength, reliability, and high-temperature performance. It is widely used in aerospace, marine, and chemical processing industries and is a preferred material for gas turbine engine components. Understanding the composition, physical, and mechanical properties of AMS 5595 is essential in selecting the right material for specific applications. It is also important to consider its hardness and heat treatment processes to optimize its performance.

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