Nickel Alloy 901/ Nimonic 901®

Technical Data Sheet

Chemical Composition Limits
Weight% Ni Cr Mo Ti Co Cu Mn Si Al C S Fe
Alloy 901 42.5 12.5 5.75 2.9 1.0 max 0.5 max 0.5 max 0.4 max 0.35 max 0.1 max 0.03 max Bal

Alloy 901 is an age-hardenable super alloy which contains Titanium and Aluminium for precipitation hardening and molybdenum for soild-solution strengthening. Alloy 901 has high yield strength and creep resistance at temperatures to about 1110°F (600°C). As Alloy 901 has a substantial iron content it enables alloy 901 to combine strength with good forging characteristics. Alloy 901 is commonly used for gas turbine engine discs, shafts, rings, casings and seals.

Heat Treatment:
Solution Treatment: 1975-2025°F / 2 hrs + Air Cool
Stabilization Heat Treatment: 1425 - 1475°F / 2-4 hrs + Air Cool
Precipitation Heat Treatment: 1325 - 1375 / 24 hrs +Any Cool

Typical Mechanical Properties

Material Tensile Strength ksi Yield Strength ksi Elongation in 4D(%) Reduction of Area % Hardness HB
Alloy 901 150 100 12 15 302-388

Alloy 901 is available in Flat Bar, Round Bar, Rod, Wire, Welding Wire and Forging Stock. For all stock availability contact Sales.

UNS N09901
Werkstoff Number 2.4662
BR HR 55
AMS 5660
AMS 5661
ISO 9723
ISO 9725
MSRR 7029, MSRR 7031
Nimonic alloy 901 (tradename)

At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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