Hardness
Stainless steel pipes are usually used to measure their hardness.
Brinell hardness
In stainless steel pipe standards, the hardness of British hardness is the most widely used. It often uses the diameter of the indentation to represent the hardness of the material, which is intuitive and convenient. However, it is not applicable to the hard or thinner steel steel pipes.
Rockwell hardness
Stainless steel pipe Llory hardness test is the same as the Bobe hardness test. The difference is that it is the depth of measurement of the indentation. The Lohs hardness test is a very widely used method, where HRC is second only to the British hardness HB in the steel pipe standard. The hardness of Luo is suitable for determining the metal material from extremely soft to extremely hard. It makes up for the British method. It is simpler than the Bud method, and can read the hardness value directly from the hardness of the hardness machine. However, because its indentation is small, the hardness value is not as accurate as the Bobe method.
Vickers hardness
The hardness test of the stainless steel tube is also a indentation test method that can be used to determine the thin metal material and surface layer hardness. It has the main advantages of the Bobe and Robe method, and overcomes their basic shortcomings, but it is not as simple as the Robe method, and the Vita method is rarely used in steel pipe standards.
Hardness detection
The inner diameter of the stainless steel pipe is above 6.0mm and the wall thickness is below 13mm. The tincture of stainless steel pipes can be used. It can use the W-B75 Weeel hardness meter. It tests very fast and simple, and is suitable for a fast and non-damaged inspection of stainless steel pipes. The inner diameter of the stainless steel pipe is greater than 30mm and the wall thickness is greater than 1.2mm. The inner diameter of the stainless steel pipe is greater than 30mm, and the wall thickness is less than 1.2mm stainless steel pipe. The surface of the Lohs hardness is used to test the HRT or HRN hardness. The inner diameter is less than 0mm, and the stainless steel pipe is greater than 4.8mm. It uses a pipe dedicated Lowl hardness meter to test the HR15T hardness. When the inner diameter of the stainless steel pipe is greater than 26mm, the hardness of the inner wall of the pipe can also be tested with the Louz or the surface of the Robe hardness meter.
