ThePipingMart Blog Grades AMS 5606 Inconel Alloy – Composition, Properties and Uses

AMS 5606 Inconel Alloy – Composition, Properties and Uses

AMS 5606

The aerospace industry requires materials that can withstand extreme conditions such as high pressure, high temperatures, and stress. AMS5606 is among the materials commonly used in the aerospace industry. It is a corrosion-resistant steel alloy that can withstand high temperatures and has excellent mechanical properties. In this blog post, you will learn what AMS 5606 is, its composition, physical and mechanical properties, uses hardness, and heat treatment methods.

What is AMS 5606?

AMS 5606 (also known as Inconel 706 Alloy) is a stainless steel alloy used in manufacturing parts and components in the aerospace industry. It has a high level of resistance to corrosion, making it ideal for use in harsh environments. This material is also known for its excellent mechanical properties, ensuring it performs well under extreme conditions. The alloy is typically manufactured in stainless steel plate, sheet, and bar form.

AMS 5606 Composition

The composition of AMS 5606 consists of mainly Iron (Fe), Chromium (Cr), Nickel (Ni), Molybdenum (Mo), and Carbon (C). The composition range of each element is as follows;

  • Iron (Fe) – 58.00%
  • Chromium (Cr) – 17.0% to 19.0%
  • Nickel (Ni) – 13.50% to 15.0%
  • Molybdenum (Mo) – 2.25% to 3.00%
  • Carbon (C) – 0.08% maximum
  • Elements Content (%)
    Nickel, Ni 39-44
    Iron, Fe 38
    Chromium, Cr 14.5-17.5
    Niobium, Nb 2.50-3.30
    Cobalt, Co ≤ 1
    Titanium, Ti ≤ 0.40
    Copper, Cu ≤ 0.35
    Manganese, Mn ≤ 0.35
    Silicon, Si ≤ 0.35
    Carbon, C ≤ 0.30
    Aluminum, Al ≤ 0.060
    Phosphorous, P ≤ 0.020
    Sulfur, S ≤ 0.015
    Boron, B ≤ 0.0060

AMS 5606 Physical Properties

AMS5606 has some unique physical properties that make it an excellent material in the aerospace industry. It has a melting point of 1385 – 1440°C, which is high compared to other metals. It has a density of 7.96g/cm³, which is relatively high, making it a bit heavy compared to other types of alloys. AMS5606 material can also withstand temperatures up to 1000°C, making it ideal for high-temperature applications.

Properties Metric Imperial
Density 8.05 g/cm³ 0.291 lb/in³
Melting point 1360°C 2480°F

AMS 5606 Mechanical Properties

AMS 5606 has incredible mechanical properties, making it highly desirable in the aerospace industry. It has a yield strength of 275 MPa and an ultimate tensile strength of 620 MPa. It also elongates 20% to 23%, meaning it can withstand significant stress and does not break easily. This material also has good impact resistance that prevents it from fracturing even under extreme pressure.

Properties Metric Imperial
Tensile strength 757 MPa 109800 psi
Yield strength (at strain 0.200%) 383 MPa 55500 psi
Poisson’s ratio (precipitation hardened, calculated by mfr) 0.382 0.382
Modulus of elasticity (precipitation hardened, dynamic method) 210 GPa 30500 ksi
Elongation at break 47% 47%

AMS 5606 Equivalent

  • AMS 5605
  • AMS 5606
  • AMS 5701
  • AMS 5702
  • AMS 5703

AMS 5606 Thermal Properties

Properties Metric Imperial
Thermal expansion co-efficient (at 24-100°C/75.2-212°F) 13.46 µm/m°C 7.478 µin/in°F
Thermal conductivity 12.5 W/mK 86.8 BTU in/hr.ft².°F

AMS 5606 Uses

The aerospace industry is the primary user of AMS 5606. It is commonly used in aircraft engine components such as turbines, exhaust systems, and combustion chambers. The material is also used to manufacture hydraulic equipment, sensors, pumps, and valves. Additionally, it can be used in the nuclear industry for manufacturing cooling elements and equipment that require resistance to corrosive substances.

AMS 5606 Hardness

AMS 5606 has a high hardness level, making it ideal for use in extreme environments. Its hardness is measured using the Brinell hardness scale. The typical values for AMS 5606 are between 190 HB and 230 HB. This hardness level ensures the material can withstand harsh conditions without deformation or damage.

AMS 5606 Heat Treatment

Heat treatment is a process used to enhance the mechanical properties of AMS 5606. The process involves heating the material to a specific temperature and then cooling it in a controlled manner. The heat treatment process can improve the material’s hardness, strength, and toughness. The typical heat treatment processes used for AMS 5606 are solution annealing, quenching and tempering.


In summary, AMS 5606 material is a stainless steel alloy used in the aerospace industry due to its excellent mechanical and chemical properties. It has a high strength-to-weight ratio, good impact resistance, and excellent corrosion resistance property. The material is used in various applications in the aerospace industry for hydraulic and nuclear equipment. AMS 5606 also has high hardness and can be further enhanced by heat treatment, making it suitable for harsh environments. Understanding the composition, properties, and uses of AMS 5606 is essential for professionals in the aerospace and manufacturing industries that utilize such materials frequently.

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