Nimonic 901 (UNS N09901 / W.Nr. 2.4662, 2.4975)

Nimonic 901 (UNS N09901 / W.Nr. 2.4662) is an age-hardenable Ni-Fe-Cr superalloy with significant additions of molybdenum, titanium and aluminum. The alloying route for this high performance material may include combinations of vacuum induction melting, vacuum arc remelting and electroslag remelting, according to the final application and the customer’s specification. Typically, the alloy is used for gas turbine engine discs, shafts, rings, casings and seals with a maximum service temperature of around 600°C (1100°F).

Equivalent Grades

Incoloy alloy 901
Nimonic 901
GH2901Incoloy 901N09901NiFeCr12Mo2.4662
Z8NCDT42Nimonic 901

Chemical Composition, %

Nimonic 901≤0.10≤0.40≤0.50≤0.030≤0.03011.0-14.040.0-45.0≤1.005.0-6.5≤0.352.8-3.1≤0.50Bal

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB

Available Products and Specifications

Rod, Bar, Wire and ForgingsAMS 5660, ISO 9723, ISO 9725
Plate, Sheet and Strip
Pipe and Tube
Welding Product


Nimonic 901 has high yield strength and creep resistance at temperatures to about 1110°F (600℃). As Alloy 901 has a substantial iron content it enables alloy 901 to combine strength with good forging characteristics.


Nimonic 901 is commonly used for gas turbine engine discs, shafts, rings, casings and seals.