How To Test The Hardness Of Stainless Steel Pipe?

Stainless Steel Pipe commonly used Brinell, Rockwell, Vickers hardness of three kinds of indicators to measure its hardness.

Brinell Hardness
In stainless steel pipe standards, Brinell hardness most widely, often expressed in the indentation hardness of the material in diameter, both intuitive and convenient. However, for a hard steel or steel thin NA.

Stainless steel tube with a Rockwell hardness test Brinell hardness test, are indentation test methods. The difference is that it is a measure of the indentation depth. Rockwell hardness test is currently very wide application, wherein after the Brinell hardness HB HRC use in steel standard. Rockwell applicable to the determination by the extremely soft to extremely hard metal materials, which make up not Brinell method, compared with Brinell method is simple and can be read directly from the dial hardness machine hardness value. However, because of its small indentation, the Brinell hardness values better method is accurate.

Vickers Hardness
Stainless steel tube Vickers indentation hardness test is also a test method for the determination of a thin layer of metal materials and surface hardness. It has a Brinell, Rockwell main advantages law, and to overcome their basic shortcomings, but not as convenient method Rockwell, Vickers method is rarely used in the steel standard.


Hardness Testing
6.0mm internal diameter stainless steel tube in the above, the wall thickness of 13mm or less in the annealed stainless steel pipe, you can use W-B75 Webster hardness tester, it tests very fast, simple and suitable for stainless steel tubing to make rapid non-destructive inspection qualified. Stainless steel pipe diameter greater than 30mm, wall thickness greater than 1.2mm stainless steel tube, using Rockwell hardness test HRB, HRC hardness. Stainless steel pipe diameter greater than 30mm, wall thickness of less than 1.2mm stainless steel tube, using surface Rockwell hardness tester, hardness testing HRT or HRN. Inside diameter of less than 0mm, greater than 4.8mm stainless steel tube, using a dedicated pipe Rockwell hardness test HR15T hardness. When the stainless steel pipe diameter greater than 26mm, you can also use Rockwell Rockwell hardness or surface hardness of the inner wall of the test tube.




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