The ASTM E 2546-15 standard specifies the basic steps and instrumental requirements of instrumented indentation testing (IIT) for measuring the indentation Hardness and Miscellaneous mechanical properties of materials. This method is suitable for thin coatings or small-size samples that are difficult to measure by traditional methods. Hardness, resilience modulus and other performance of materials can be analyzed by load-displacement Linear dispersion. The standard describes in detail the selection of test equipment, calibrate, sample preparation, test process and data analysis methods to ensure the accuracy and repeatability of test results. IIT is widely used in materials science, coating technology and quality control due to its high-precision and flexibility.