ThePipingMart Blog Grades AMS 5565 Stainless Steel – Composition, Properties, and Uses

AMS 5565 Stainless Steel – Composition, Properties, and Uses

AMS 5565

AMS 5565 is a highly popular grade of stainless steel commonly used in aerospace, chemical processing, and medical devices. This alloy is known for its excellent corrosion resistance, strength, and flexibility. This blog post will delve deeper into what AMS 5565 is, its chemical composition, physical and mechanical properties, hardness, heat treatment, and applications.

What is AMS 5565?

AMS 5565 (also known as 304L Stainless Steel) is a specification that governs the production of seamless steel tubes for high-temperature and high-pressure applications. It sets strict guidelines for the chemical composition, mechanical properties, and dimensions of the tubes, ensuring their reliability and durability in extreme environments. Engineers and manufacturers rely on AMS 5565 sheet to assess the quality and suitability of the tubes for critical applications, such as oil and gas exploration, power generation, and aerospace engineering. Whether you are designing a next-generation aircraft engine or a processing plant for harsh chemicals, understanding the requirements of AMS5565 is essential to ensure the safety and efficiency of your operations.

AMS 5565 Composition

AMS 5565 is a nickel-chromium-molybdenum alloy that contains 16-18% chromium, 10-14% nickel, and 2.50-3.50% molybdenum. Additionally, it has small amounts of titanium, columbium, and tantalum, which enhance its strength and stability at high temperatures. The alloy has a maximum carbon content of 0.05% and a maximum sulfur content of 0.025%.

C Mn Si P S Cr Ni N
5565 0.03max 2.0max 0.75max 0.045max 0.03max min: 18.0 max: 20.0 min: 8.0 max: 12.0 0.10 max

AMS 5565 Physical Properties

This alloy has a density of 7.85 g/cm3 and a melting point of 1370-1425°C. It exhibits excellent thermal conductivity, which is essential in high-temperature applications. It has a coefficient of thermal expansion ranging from 16.5-18.5 µm/m°C, which enables it to expand without warping or cracking.

Property Value
Density 8000.00 Kg/m3
Melting Point 1450 °C
Thermal Expansion 17.2 x 10-6 /K
Modulus of Elasticity 193 GPa
Thermal Conductivity 16.2W/m.K
Electrical Resistivity 0.072 x 10-6 Ω .m

AMS 5565 Mechanical Properties

AMS 5565 exhibits good tensile strength, yield strength, and elongation properties. Its tensile strength is 870-1180 MPa, and its yield strength ranges from 460-760 MPa. The alloy elongates 15-25%, stretching without breaking. Its hardness ranges from 215-277 HB, which is quite remarkable.

Property Value
Proof Stress 200 Min MPa
Tensile Strength 500 – 700 MPa
Elongation 45 Min%

AMS 5565 Uses

Due to its impressive properties, AMS 5565 is used in various sectors. In the aerospace industry, it manufactures components for aircraft engines and gas turbines due to its excellent heat and corrosion resistance. The oil and gas industry also uses it in oil wells, pipelines, and valves, where resistance to high temperatures and corrosive environments is necessary. It is also used to manufacture medical devices, surgical implants, and dental equipment due to its excellent biocompatibility.

AMS 5565 Hardness

AMS 5565 has exceptional hardness. It has a hardness of 215-277 HB in its annealed condition. However, its hardness increases after heat treatment to 300-350 HB. This makes it highly sought-after in applications where exceptional hardness is necessary.

AMS 5565 Heat treatment

AMS 5565 can be supplied in the annealed condition, which is easy to fabricate and form. However, it can undergo heat treatment for enhanced strength and hardness, such as solution annealing at 1040-1120°C and quenching in water or air. This process enhances its mechanical properties, making it suitable for harsh environments.


In conclusion, AMS 5565 material is a highly versatile grade of stainless steel highly resistant to heat, corrosion, and wear. Its impressive properties make it highly sought-after in various sectors, such as aerospace, chemical processing, and medical devices. Its chemical composition and mechanical properties make it suitable for harsh environments. In contrast, its hardness and heat treatment make it ideal for use in applications where exceptional wear resistance is necessary. Overall, AMS 5565 is an excellent material that delivers outstanding performance and value for money.

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