Abstract: Aircraft aluminum wires are vital components in the electrical systems of aircraft equipment. Research on non-destructive testing methods for evaluating the performance of these wires is essential to ensure the safe and stable operation of aircraft. Given its advantages of high sensitivity and low attenuation, the nonlinear ultrasonic quasi-static component is employed in this study to investigate the influence of changes in the material properties of aircraft aluminum wires on the nonlinear effect and realize the evaluation of the material properties of aircraft aluminum wires based on the ultrasonic quasi-static component. In this paper, the material properties of aluminum wires were altered by maintaining a constant heating temperature while varying the heat preservation duration in graded intervals. Both electrical methods and the nonlinear ultrasonic quasi-static component method were used to test the heat-treated wires, and the results from the two methods showed a high degree of consistency. The findings indicate that the amplitude of the quasi-static component increases steadily with longer treatment times, demonstrating a monotonic relationship between the amplitude of the nonlinear ultrasonic quasi-static component and changes in the material properties of aircraft aluminum wires. This confirms the effectiveness and feasibility of using the nonlinear ultrasonic quasi-static component for evaluating material property changes in aircraft aluminum wires.