The hardness value measured by the NHBE-3000A electronic Brinell hardness tester is one of the important indicators of the mechanical properties of materials, and the hardness test is an important means to judge the quality of metal materials or parts. Since there is a corresponding relationship between the hardness of metals and other mechanical properties, for most metal materials, other mechanical properties such as strength, fatigue, creep and wear can be approximately calculated by measuring the hardness.