GB/T 5482-2023 "Metallic materials, dynamic tearing test method" specifies the test method for determining the dynamic tearing energy and shear section rate of metallic materials or welded joint specimens with rockwell hardness value less than 36 HRC. The standard describes in detail the preparation of the specimen, the selection of the testing machine, the execution of the test procedure, the calculation method of the shear section rate, the processing of the test results and the preparation requirements of the test report. This standard is suitable for evaluating the mechanical properties of metallic materials under dynamic tearing conditions, providing important data support for material design and engineering applications.