Which statement regarding the residual magnetizing inspection method is accurate?

The statement indicating that the residual magnetizing inspection method is suitable for steels that have been heat treated for stressed applications is correct because this method utilizes the magnetic properties of materials to detect surface and near-surface discontinuities. Heat-treated steels, which are often used in applications involving significant stress, can retain some residual magnetism even after processes such as quenching or tempering. This residual magnetism is key to the effectiveness of the inspection method, allowing it to identify flaws or defects that could affect the performance of steel components under stress.

In the case of heat-treated steels, the residual magnetism can be sufficient to reveal subsurface defects that might lead to failure in critical applications. The ability to inspect these materials is crucial in industries where reliability and safety are paramount, such as aerospace and automotive manufacturing. Thus, the suitability for stressed heat-treated steels is an important aspect of the residual magnetizing inspection method.