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. Availability Alloy 901is available in Flat Bar, Round Bar, Rod, Wire, weld wire and Forging Stock. For all stock availability. Technical Data 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 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 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 Specifications UNS N09901 Werkstoff Number 2.4662 BR HR 55 AMS 5660 AMS 5661 AECMA PrEN2176 AECMA PrEN2177 ISO 9723 ISO 9725 MSRR 7029, MSRR 7031 Nimonic alloy 901 (tradename)