Some of our users in the purchase of 304 stainless steel pipe, often according to the hardness of the pipe to distinguish the quality of 304 stainless steel pipe. We can only say that this way of purchasing is also right but also wrong. It is impossible to judge the quality of 304 stainless steel pipe simply by its hardness.

         In fact, often used to weigh the hardness of stainless steel tube indicators are brinell, Rockwell, Vickers three, the differences are as follows: Vickers hardness (code HV) stainless steel tube Vickers hardness test is a kind of indentation experiment method, can be used to determine the very thin metal data and surface hardness. It has the main advantages of Brinell and Rockwell tests, but overcomes their fundamental defects and is not as cumbersome as rockwell tests, and vickers tests are rarely used in steel pipe specifications. However, vickers hardness tester has a wide measurement range and can measure almost all the metal data used in the industry at present.