Hardness Comparison Table

What is Hardness?

Hardness should be considered as the material property and its ability to resist plastic deformation, usually by penetration. However, the expression 'hardness' in this context may also refer to its scratching, bending, abrasion or cutting resitance.

Measurement of Hardness

All tables and charts should be considered as giving approximate equivalents, particularly when converting to a method or scale which is not physically possible for the particular test material and thus cannot be verified. An example would be converting HV/10 or HR-15N value on a thin coating to the HRC equivalent.

The data in the following table is approximate:

Brinell 10mm BallFirth or Vickers 120kgC Scale 120 degree coneB Scale 1/16™ ball
3000kg load120kg load150kg load100kg load
800-72-
780122071-
760117070-
745111468-
725106067-
712102166-
68294065-
66890564-
65286763-
62680362-
61477561-
60174660-
59072759-
57669457-
55264956-
54563955-
52960654-
51458753120
50256552119
49555151119
47753449118
46150248117
45148947117
44447446116
42746045115
41543544115
40142343114
38840142114
37439041113
37038540112
36238039111
35136138111
34635237110
34134437110
33133536109
32332035109
31131234108
30130533107
29329132106
28528531105
27627830105
26927229104
26126128103
25825827102
25525527102
24925026101
24524625100
2402402499
2372352399
2292262298
2242212197
2172172096
2112131995
2062091894
2032011794
2001991693
1961971592
1911901492
1871861391
1851841291
1831831190
1801771089
175174988
170171787
167168687
165165586
163162485
160159384
156154283
154152182
152150-82
150149-81
147147-80
145146-79
143144-79
141142-78
140141-77
135135-75
130130-72

Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.