Non-destructive testing (NDT), also known as non-destructive inspection, is a method of examining and testing the internal and surface structure, properties, and state of a specimen, as well as the type, nature, quantity, shape, location, size, distribution, and changes of defects, without damaging or affecting the performance of the object being tested. It utilizes changes in thermal, acoustic, optical, electrical, and magnetic responses caused by abnormalities or defects in the internal structure of the material. Based on the data, a quality evaluation is made. NDT of casting quality provides a direct and reliable basis for improving casting processes, playing a crucial role in improving casting quality, reducing and eliminating casting scrap, and lowering casting production costs. Regular NDT of in-service products or equipment, monitoring for dangerous defects, can prevent problems before they occur, playing a vital role in preventing and eliminating catastrophic accidents.
   Many NDT methods exist, and four methods are widely used for cast steel parts. Internal quality inspection and evaluation of castings employs radiographic testing (RT) and ultrasonic testing (UT), while surface quality inspection and evaluation methods include Hirata magnetic particle testing (MT) and penetrant testing (PT).
   Xinxiang Changcheng Cast Steel Co., Ltd. possesses imported physical and chemical testing equipment with complete specifications and advanced technology. We pursue excellence in quality, ensuring high-end, high-quality products. We are capable of performing hardness testing, magnetic particle testing (MT), and ultrasonic testing on large cast steel parts, meeting the requirements of different national testing standards, ensuring reliable casting quality and timely delivery.