The ASTM E384-22 standard specifies a test method for the micro-indentation hardness of materials. This method evaluates the hardness of materials by applying a small load to produce indentation on the surface of the material, measuring the depth or size of the indentation. It is suitable for very small samples or thin film materials and can provide high accuracy hardness data. The standard details the test equipment, operation steps and data processing methods to ensure the reliability of the test results. This method is widely used in the hardness detection of thin films, coatings and micro areas, especially in materials science, electronics and microstructure analysis.