The hardness test is to slowly press a hard indenter into the surface of a seamless pipe sample under specified conditions, and then test the depth or size of the indentation to determine the hardness of the material. Hardness testing is the simplest, fastest and most convenient method for testing the mechanical properties of materials. Hardness testing is non-destructive and there is an approximate conversion relationship between material hardness values and tensile strength values. The hardness value of the material can be converted into a tensile strength value, which is of great practical significance.


1. Brinell hardness

2. Rockwell hardness

3. Vickers hardness