Three hardnesses of stainless steel pipes

Stainless steel pipes are widely used in the manufacture of mechanical parts and engineering structures, so what are the three hardnesses of stainless steel pipes? Let me introduce it to you, I hope it can be helpful to you.
1. Brinell hardness
 In the stainless steel pipe standard, the Brinell hardness is widely used, and the hardness of the material is often expressed by the indentation diameter, which is both intuitive and convenient. However, it is not suitable for steel pipes of harder or thinner steel.
2. Rockwell hardness
The Rockwell hardness test of stainless steel pipe is the same as the Brinell hardness test, which is an indentation test method. The difference is that it measures the depth of the indentation. Rockwell hardness
The test is a widely used method at present, among which HRC is second only to Brinell hardness HB in the steel pipe standard. Rockwell hardness can be used to measure from very soft to very hard
It makes up for the shortcomings of the Brinell method, which is simpler than the Brinell method and can directly read the hardness value from the dial of the hardness machine. However, due to its small indentation,
Therefore, the hardness value is not as accurate as the Brinell method.
3. Vickers hardness
The Vickers hardness test of stainless steel pipes is also an indentation test method that can be used to determine the hardness of very thin metal materials and surface layers. It has Brinell, Rockwell
However, it is not as simple as the Rockwell method, and the Vickers method is rarely used in steel pipe standards.