The "GB/T 5313-2010 Film thickness directional performance steel plate" standard specifies the performance grade, test method and inspection rules of the steel plate in the film thickness direction. The standard is mainly used to determine the ability of the film thickness direction to resist lamellar tearing. The evaluation method is realized by the section cissing rate of the film thickness directional tensile test. Applicable steel plates with a film thickness range of 15 mm to 400 mm are killed steels. The standard also clarifies the method of indicating the grade of the film thickness directional performance steel plate, which is convenient for ordering according to specific requirements. This standard helps to ensure that the steel plate has good Film thickness directional performance in practical applications.