ThePipingMart Blog Grades AMS 5879 Inconel Alloy – Composition, Properties and Uses

AMS 5879 Inconel Alloy – Composition, Properties and Uses

AMS 5879

AMS 5879 is a high-performance stainless steel alloy known for its exceptional strength, corrosion resistance and wear resistance. This premium-grade metal is famous for various industrial aerospace, defence, and oil and gas applications. This article will explore the composition, physical properties, mechanical properties, uses, hardness and heat treatment of AMS5879 to thoroughly understand the alloy’s features and benefits.

What is AMS 5879?

If you’re in the manufacturing industry, you may have heard of AMS 5879 (also known as Inconel 625 Alloy). This material is a type of superalloy specifically designed to withstand the most extreme conditions. It can withstand high temperatures, corrosion, and wear, making it ideal for aerospace, defence, and industrial applications. AMS 5879 is made up of a combination of nickel, cobalt, chromium, and other elements, giving it exceptional strength and durability. Whether you’re creating parts for a rocket or a turbine, AMS5879 is a reliable option that can stand up to even the harshest environments.

What Forms Is AMS 5879 Available at Piping Mart?

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

AMS 5879 Composition

AMS 5879 is a precipitation hardenable, nickel-based superalloy that contains significant amounts of iron, cobalt, chromium, and molybdenum. The composition of this alloy is carefully controlled to achieve specific mechanical and physical properties. The presence of nickel provides excellent resistance to corrosion, while iron and cobalt enhance its strength and durability. The high chromium and molybdenum content gives AMS 5879 exceptional wear and heat resistance properties.

NI 58.0 min
AL 0.40 max
FE 5.0 max
MN 0.50 max
C 0.10 max
SI 0.50 max
S 0.015 max
P 0.015 max
CR 20.0 – 23.0
NB + TA 3.15 – 4.15
MO 8.0 – 10.0
TI 0.40 max

AMS 5879 Physical Properties

AMS 5879 has a density of 8.22 g/cm³ and a melting point of 1340°C. It exhibits excellent thermal stability and can withstand high temperatures up to 871°C. The alloy also has good magnetic properties, making it suitable for electromagnetic applications.

DENSITY 8.44 g/cm 3 / 0.305 lb/in 3
MELTING POINT 1290 -1350 (°C) / 2350 – 2460 (°F)
SPECIFIC HEAT @ 70°F 0.098 Btu/lb/°F
CURIE TEMPERATURE -190 (°C) / < -320 (°F)
YOUNG’S MODULUS (N/MM2) 205 x 10
ANNEALED 871 (°C) / 1600 (°F)
QUENCH Rapid Air

AMS 5879 Mechanical Properties

AMS 5879 has exceptional mechanical properties that make it suitable for demanding applications requiring high strength and wear resistance. It has a tensile strength of 1700 MPa and a yield strength of 1500 MPa. The alloy also has good fatigue properties, making it suitable for high-stress environments.

PROPERTY 21°C 204 °C 316 °C 427 °C 538 °C 649 °C 760 °C 871 °C
Ultimate Tensile Strength /Mpa 992.9 923.9 910.1 910.1 896.3 820.5 537.8 275.8
0.2% Yield Strength /MPa 579.2 455.1 434.4 420.6 420.6 413.7 406.8 268.9
Elongation % 44 45 42.5 45 48 34 59 117
Coefficient of Thermal Expansion µm/m⁰C 13.1 13.3 13.7 14 14.8 15.3 15.8
Thermal Conductivity /kcal/(hr.m.°C) 8.5 10.7 12.2 13.5 15 16.4 17.9 19.6
Modulus of Elasticity/ MPa 2.07 1.93 1.93 1.86 1.79 1.65 1.59

AMS 5879 Equivalent

Inconel 625 2.4856 N06625 NCF 625 ХН75МБТЮ NA 21 NC22DNB4MNiCr22Mo9Nb NiCr23Fe

AMS 5879 Uses

AMS 5879 is widely used in the aerospace and defence industries, where it is used to make components for aircraft engines, gas turbines, and other high-performance applications. Its excellent corrosion resistance suits oil and gas applications, such as downhole tools and pipelines. The alloy is also used in the automotive industry, where it is used to manufacture engine components.

AMS 5879 Hardness

AMS 5879 can be hardened using various methods, including heat treatment and precipitation hardening. The alloy can achieve a hardness of up to 45 HRC when heat-treated to a temperature of 1210°C. Precipitation hardening can also be used to increase its hardness and strength.

AMS 5879 Heat Treatment

AMS 5879 can be heat-treated to achieve specific mechanical properties. It can be annealed at 1149°C and then cooled in the air to achieve a soft, ductile structure. It can also be hardened by heat treatment, heated to a temperature of 1210°C and then quenched in oil.


In conclusion, AMS 5879 material is an exceptional superalloy with unparalleled strength, corrosion resistance, and wear resistance. Its unique properties make it suitable for various demanding aerospace, defence, oil and gas, and automotive applications. The alloy’s composition, physical properties, mechanical properties, uses, hardness and heat treatment contribute to its exceptional performance and versatility. If you’re looking for a high-performance material for your next project, AMS 5879 is an excellent choice.

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