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Hardness stainless steel pipes are generally used to measure their hardness: Brinell and Rockwell and Vickers.
Brinell hardness is the most versatile in stainless steel pipe standards, often indicating the hardness of the material in terms of indentation diameter, which is both intuitive and convenient. However, it is not suitable for steel pipes with harder or thinner steel. Rockwell hardness stainless steel pipe Rockwell hardness test is the same as 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, among which HRC is used in steel pipe standards second only to Brinell hardness HB. Rockwell hardness can be applied to the determination of metal materials from very soft to very hard, which makes up for the lack of Brinell and is simpler than the Brinell method, and can read the hardness value directly from the dial of the hardness tester. However, due to its small indentation, the hardness value is not as accurate as the Brinell method.
Vickers hardness stainless steel pipe Vickers hardness test is also an indentation test method that can be used to determine the hardness of very thin metal materials and surface layers. It has the main advantages of Brinell and Rockwell methods, and overcomes their basic shortcomings, but it is not as simple as the Rockwell method, and the Vickers method is rarely used in steel pipe standards. Hardness testing Annealed stainless steel pipes with an inner diameter of more than 6.0mm and a wall thickness of less than 13mm can be tested using W-B75 Wechsler hardness tester, which is very fast and easy to test, and is suitable for fast and non-destructive qualification inspection of stainless steel pipes.
Stainless steel pipes with an inner diameter of more than 30mm and a wall thickness of more than 1.2mm are tested by using a Rockwell hardness tester to test HRB and HRC hardness. Stainless steel pipes with an inner diameter of more than 30mm and a wall thickness of less than 1.2mm are tested for HRT or HRN hardness using a surface Rockwell hardness tester. Stainless steel pipes with an inner diameter of less than 0mm and greater than 4.8mm are tested with a special Rockwell hardness tester for pipes.
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 a Rockwell or surface Rockwell hardness tester. develop
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