GB/T 46436-2025 stipulates the sample preparation method of enamel products and porcelain enamel, as well as the determination principle of thermal expansion coefficient, test process and data processing requirements, which are suitable for the performance inspection of related products. The standard provides a unified technical basis for the research and development, production quality control and application evaluation of enamel products and porcelain enamel, ensures the accuracy and comparability of test data, and helps to standardize the material performance inspection process of related industries.