KS B0812-2001 Hardness test method is a Korean national standard on hardness of materials testing, which is suitable for evaluating the hardness performance of metal and Non-metallic materials. The standard specifies in detail a variety of hardness test methods, including brinell hardness, rockwell hardness, Vickers hardness and microhardness, etc., covering the testing needs of different materials and application scenarios. The content includes the requirements of the test equipment, the preparation method of the sample, the test procedure, and the calculation and representation of the hardness value. In addition, the standard places specific requirements on the selection of test conditions, the accuracy and repeatability of the data to ensure the accuracy and conformity of the test results. This standard provides a scientific basis for material performance testing, quality control and process evaluation, and is an important reference in the field of hardness testing.