Ultrasonic inspection is an inspection method that uses high-frequency sound waves to examine the internal structure of materials such as iron and steel. In this method, sound waves create reflections as they travel through the material. These reflections are analyzed to identify defects or structural features in the material. It is especially used to detect defects such as welded joints, cracks or embedded foreign objects. Ultrasonic inspection is an important tool to evaluate material quality and improve safety in the production process.