GB/T 2518-2019 "Continuous hot-dip galvanized and zinc alloy platings steel plates and steel strips" standard stipulates the terms and definitions, classification, code and grade representation method, order content, size, shape, weight, technical requirements, test methods, inspection rules, Encasement, marking and mass certificate of continuous hot-dip galvanized, zinc-iron alloy, zinc-aluminum alloy and aluminum-zinc alloy platings steel plates and steel strips. It is suitable for steel plates and steel strips with a thickness of 0.20 mm to 6.0 mm, and is widely used in automotive, construction, home appliances and other industries. The standard contains a number of chemical analysis, mechanical properties testing and platings mass evaluation methods to ensure that the product meets the expected technical requirements and mass standards. In addition, the standard lists a large number of normative reference documents for reference in the implementation and application of this standard.