Stainless steel pipe

Stainless steel pipe

　　Stainless steel pipe is a kind of hollow long round steel, which is widely used in industrial transmission pipelines and machinery such as petroleum, chemical industry, medical treatment, food, light industry, machinery and instruments.

　　hardness

　　Brinell, Rockwell and Vickers hardness indexes are commonly used to measure the hardness of stainless steel pipes.

　　Brinell hardness

　　Brinell hardness is the most widely used standard for stainless steel pipe. Indentation diameter is often used to express the hardness of the material, which is intuitive and convenient. However, it is not applicable to steel pipes with hard or thin steel.

　　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 test is a widely used method, in which HRC is second only to Brinell hardness Hb in steel pipe standards. Rockwell hardness can be used to measure metal materials from very soft to very hard. It makes up for the disadvantage of Brinell method. It is simpler than Brinell method and can directly read the hardness value from the dial of hardness machine. However, because of its small indentation, the hardness value is not as accurate as Brinell method.