GB/T 4340.4-2022 provides the Vickers Hardness value table for metal materials. The standard summarizes the Vickers Hardness values corresponding to the diagonal length of a large number of different indentations, covering a variety of common test force conditions. The Hardness value table is arranged in a standardized format, which is clear and intuitive, and easy to read. Whether it is metal material research and development, mass testing in the production process, or related scientific research work, users can quickly and accurately obtain the Vickers Hardness value based on the indentation data obtained from the measurement, and provide key data support for evaluating the performance of metal materials.