Nimonic 263 is an alloy made of nickel, chromium, and cobalt. It has a high-temperature strength and excellent corrosion resistance due to its well-balanced composition. The ultimate tensile strength is 1400 MPa with a fatigue limit around 1050 MPa, whereas its thermal expansion coefficient at temperature range from 20°C to 1000°C is 9.4x10⁻⁶/K. It also contains titanium for grain refinement, which improves thermal stability and formability when hot-worked or cold-rolled. This makes it suitable for applications requiring superior mechanical properties and oxidation resistance at elevated temperatures, such as gas turbine blades or springs operating at temperatures up to 800°C (1472°F).

Nimonic 263 is an age-hardenable, nickel-base superalloy primarily used for its outstanding creep and corrosion resistance at temperatures up to about 1100°C. It can be used for many components in aerospace gas turbine engines due to its excellent mechanical properties and superior oxidation resistance. Its applications extend from airframe components like exhaust nozzles, combustion liners, afterburner cans and turbine blades to high-temperature studies of thermomechanical fatigue behaviour.