C1023 is a precipitation-hardened alloy offering a well-proven combination of creep strength, oxidation resistance, and castability for investment cast hot-section components. It is extensively used for turbine blades and nozzle guide vanes in military and civil aero-engines, qualified under MSRR 7046 and EMS 73669 specifications. Its balanced chemistry supports good microstructural stability and consistent mechanical properties over long service intervals.