ThePipingMart Blog Grades AMS 5599 Nickel Alloy – Composition, Properties, and Uses

AMS 5599 Nickel Alloy – Composition, Properties, and Uses

AMS 5599

AMS 5599 is a popular nickel alloy widely used in various industries for its high strength, excellent corrosion resistance, and outstanding heat resistance properties. In this blog post, we will explore the different aspects of AMS 5599, including its composition, physical and mechanical properties, uses, hardness, and heat treatment methods.

What is AMS 5599?

AMS 5599 (also known as Inconel Alloy 625) is a specification for nickel-chromium-cobalt-molybdenum alloy, specifically designed for use in extreme environments where other materials would quickly fail. This alloy can withstand temperatures up to 1200°F and has excellent oxidation and chemical corrosion resistance. It’s commonly used in aerospace, gas turbine, and power generation industries for jet engine components, combustion liners, and afterburner parts. So, the next time you fly at 30,000 feet, remember that materials like AMS5599 help keep you safe and secure in the sky.

What Forms is AMS 5599 Available at Piping Mart?

  • Nut
  • Bar
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Flanges
  • Fasteners
  • Electrodes
  • Stud Bolts
  • Sheet Plates
  • Pipe Fittings
  • Forged Fitting
  • Instrumentation Fittings

AMS 5599 Composition

AMS 5599 sheet is a nickel-chromium-cobalt-molybdenum alloy containing small amounts of iron, silicon, and manganese. The alloy is known for its exceptional resistance to high-temperature corrosion due to its high nickel and chromium content.

Element Content (%)
Nickel, Ni 60
Chromium, Cr 22
Molybdenum, Mo 9
Iron, Fe 4
Niobium, Nb 3.5
Titanium, Ti 0.3
Manganese, Mn 0.3
Aluminum, Al 0.3
Silicon, Si 0.25
Carbon, C 0.05
Sulfur, S 0.003
Phosphorous, P 0.01

AMS 5599 Physical Properties

The physical properties of AMS 5599 plates are impressive. It has a density of 8.05 g/cm³, a melting point of 1350°C, and a thermal conductivity of 10.3W/m.K. The alloy also exhibits good electrical conductivity and magnetic properties, making it suitable for electronic components and magnetic devices.

Properties Metric Imperial
Density 8.44 g/cm³ 0.305 lb/in³
Melting point 1330°C 2425°F

AMS 5599 Mechanical Properties

AMS 5599 material is a high-strength alloy with a tensile strength of up to 760 MPa and a yield strength of up to 345 MPa. It also has excellent elongation and toughness properties, making it resistant to cracking and other mechanical damage. The alloy is highly malleable, which makes it easy to process and shape into various forms.

Properties Metric Imperial
Hardness, Rockwell B (typical annealed) 95 95
Tensile strength (for flat products (<4″ thickness) and seamless tube and pipe) ≥ 827 MPa ≥ 120000 psi
Yield strength (for flat products (<4″ thickness) and seamless tube and pipe) ≥ 414 MPa ≥ 60000 psi
Elongation at break (typical annealed) 45% 45%

AMS 5599 Equivalents

AMS 5581 AMS 5837 ASTM B443 ASTM B704 GE B50TF133
AMS 5599 AMS 5879 ASTM B444 ASTM B705 MIL E-21562 (RN625)
AMS 5666 ASTM B366 ASTM B446 DIN 2.4856

AMS 5599 Uses

AMS 5599 finds extensive usage in various high-temperature applications, such as gas turbines, jet engines, and heat exchangers. The alloy is also used in chemical processing equipment, aerospace components, nuclear reactors, and oil and gas drilling equipment. Thanks to its excellent corrosion resistance properties, AMS 5599 is a reliable choice for harsh environments that require high-performance materials.

AMS 5599 Hardness

AMS 5599 has an average hardness of 220 HBW (hardness Brinell), which is relatively high compared to other nickel alloys. The high hardness makes the alloy less prone to wear and tear, thus increasing its longevity and durability.

AMS 5599 Heat treatment

AMS 5599 can withstand high-temperature exposure of up to 982°C without losing its structural integrity. Additionally, the alloy can be heat-treated to further enhance its mechanical and corrosion resistance properties. Solution annealing and age-hardening are the most common heat treatment methods for AMS 5599.

AMS 5599 Density

AMS 5599 is a high-performance alloy with a density that sets it apart from other materials. As one of the leading nickel alloys, it boasts outstanding strength and durability while maintaining its lightweight and corrosion-resistant properties. Whether used in aerospace, oil and gas, or industrial applications, AMS 5599 material properties provides reliable performance and long-term cost savings. Its unique density allows for efficient and streamlined designs, making it a popular choice for complex components and structures. With AMS 5599, you can trust that your project will withstand the test of time and exceed your expectations.


AMS 5599 is a versatile nickel alloy with exceptional properties that suit various high-temperature applications. Its unique combination of high strength, excellent corrosion resistance, and outstanding heat resistance has made it a top choice for industries that require high-performance materials. Whether in the aerospace, oil and gas, or chemical processing industry, you can always count on AMS 5599 to deliver exceptional results.

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