This series of impacts is used to test the performance of metal materials in resisting impacts under dynamic loads, in order to determine the quality condition of materials under dynamic loads, in accordance with the national standard GB/T3808-2002 "Pendulum Inspection". GB/T229-2007 "Charpy Pendulum Impact Test Method for Metallic Materials" and international standards ISO R148 "Steel Simply Supported Beam (V-notch) Impact Test" and ISO R83 "Steel CharPr Impact Test (U-notch)" are used to conduct impact tests on metallic materials.