Hv Hardness Scale

Rockwell c scale hardness hrc.

Hv hardness scale. The most common scales used to test stainless steel hardness are the b and c scales the latter usually used for hardened stainless steels. When the hardness value is less than 20hrc because the conical part of the indenter is pressed too much the sensitivity is reduced and the hrb scale should be used instead. The various types of hardness are measured using different testing methods. 440hv30 or xxxhvyy zz if duration of force differs from 10 s to 15 s e g.

A commonality among all methods is the use of an indenter to create the indentation on the test piece surface area. Brinell hardness hb vickers hardness hv rockwell hrb rockwell hrc ultimate tensile strength n mm2. What is brinell hardness test. Since the various types of hardness tests do not all measure the same combination of material properties conversion from one hardness scale to another is only an approximate process.

Black and white version of conversion table for determining equivalent hardness for rockwell rockwell superficial vickers brinell scleroscope and ultimate tensile strength. A variety of hardness testing methods are available including the vickers brinell rockwell meyer and leeb tests although it is impossible in many cases to give an exact conversion it is possible to give an approximate material specific comparison table for steels. 3000kg 10mm ball 150kg brale 100kg 1 16 ball. The rockwell hardness test is a hardness measuring method using rockwell scale to measure the depth of penetration of an indenter under a large load on the surface.

Vickers hardness number hv. 66 5 66 1 65 7 65 3 64 9 64 5 64 1 63 7 63 3 62 9 62 5 62 1 61 7 61 3 60 9 60 5. 440 is the hardness number hv gives the hardness scale vickers 30 indicates the load used in kgf. Convert hardness to equivalent hardness from different scales.

Rockwell c scale hardness hrc. Rockwell scale has different scales denoted by a single letter. The higher the number in the scales means the harder is the material. Vickers hardness number hv.

900 890 880 870 860 850 840 830 820 810 800 790 780 770 760 750 740 730. Rockwell c scale hardness hrc. In this test c scale a diamond cone is used as an indenter and the measure considered to calculate the hardness number is the penetration of the indenter. Tensile strength approx reference table.

The use range of hrc scale is 20 70hrc. Forged rolls have higher internal superficial compression than cast rolls. Vickers hardness numbers are reported as xxxhvyy e g. Vickers hardness number hv rockwell hardness number hra hrb hrc etc leeb hardness value hld hls hle etc measuring hardness.

Rockwell c scale hardness hrc. 20 indicates the loading time if it differs from 10 s to 15 s.