The failure caused by microscopic damage such as material fatigue, creep and residual stress is the most common failure mode of engineering materials and components, up to 80% of the total failure of the whole engineering materials and components. Therefore, an objective assessment of state of the metal must be formed from the data on stress-strain (fatigue) condition and its defectiveness. Modern Nondestructive Evaluation is based primarily on information obtained in the process of defect detection operation, because in practice of mass-production nondestructive inspection there is no apparatuses and methods for assessing fatigue. Today coercimetry, which has a method and apparatus, allows to identify and assess qualitative and quantitative changes in the stress-strain and fatigue condition in a fast, easy and cheap way. This ensures completeness of the raw data of Nondestructive Evaluation.