Incoloy 901 nickel-iron-chromium alloy containing titanium and aluminum for precipitation hardening and molybdenum for solid-solution strengthening. The Cr content in nickel-based alloy incoloy 901 is usually 11.0-14.0%, and the nickel content is 40-45%. The alloy has high yield strength and creep resistance at temperatures to about 1110°F (600°C). A substantial iron content enables the alloy to combine high strength with good forging characteristics.
Incoloy 901 is widely used abroad for rotating parts and fasteners on aero engines and ground gas turbines that work below 650°C, and has a long service life. It has also been used in aero engines in China, and it is a mature alloy that has passed the test of use. Alloy forging is advanced, if the process parameters are selected or operated improperly, its performance will show obvious directionality and may cause notch sensitivity, but as long as the process is strict, this phenomenon will not occur. The expansion coefficient of the alloy is close to ferritic heat-strength alloy steel, so that the two materials can be connected and there is no special requirement for the heat account.
