X-750 is a nickel-chromium based super alloy of usefulness in a wide variety of applications such as gas turbines, rocket engines, nuclear reactors, etc. Its good mechanical properties are due to the strengthening from precipitation of γ’ particles upon ageing heat treatment. The mechanical properties of both heat treated and as received (solution annealed only) X-750 have been tested by uniaxial tensile testing under a large temperature range, room temperature to 900°C, and at three strain rates (10^-3, 10^-4, 10^-5). The mechanical property progression due to temperature and heat treatment variation, as well as the plastic behavior were investigated. Dynamic strain aging and the PLC (Portevin–Le Chatelier) effect have been frequently observed in nickel base superalloys; the PLC regime, depending on strain rate and temperature, was studied in X-750. Through observational techniques including TEM and SEM, material characterization was utilized to explain mechanical behavior and microstructural evolution.