Hardness Conversion Table
Approximate Hardness Equivalents Covering Range of Rockwell C and Rockwell B Scales
|
BRINELL |
ROCKWELL SCALES |
VPN |
|||||||||||||||
|
BHN |
BHN |
A |
B |
C |
D |
E |
F |
G |
H |
K |
15N |
30N |
45N |
15T |
30T |
45T |
DPH HV/10 |
|
|
|
92 |
|
80 |
87 |
|
|
|
|
|
97 |
92 |
87 |
|
|
|
1865 |
|
|
|
92 |
|
79 |
86 |
|
|
|
|
|
96 |
92 |
87 |
|
|
|
1787 |
|
|
|
91 |
|
78 |
85 |
|
|
|
|
|
96 |
91 |
86 |
|
|
|
1710 |
|
|
|
91 |
|
77 |
84 |
|
|
|
|
|
96 |
91 |
85 |
|
|
|
1633 |
|
|
|
90 |
|
76 |
83 |
|
|
|
|
|
96 |
90 |
84 |
|
|
|
1556 |
|
|
|
90 |
|
75 |
83 |
|
|
|
|
|
95 |
89 |
83 |
|
|
|
1478 |
|
|
|
89 |
|
74 |
82 |
|
|
|
|
|
95 |
89 |
82 |
|
|
|
1400 |
|
|
|
89 |
|
73 |
81 |
|
|
|
|
|
95 |
88 |
81 |
|
|
|
1323 |
|
|
|
88 |
|
72 |
80 |
|
|
|
|
|
95 |
87 |
80 |
|
|
|
1245 |
|
|
|
87 |
|
71 |
80 |
|
|
|
|
|
94 |
87 |
79 |
|
|
|
1160 |
|
|
|
87 |
|
70 |
79 |
|
|
|
|
|
94 |
86 |
78 |
|
|
|
1076 |
|
|
|
86 |
|
69 |
78 |
|
|
|
|
|
94 |
85 |
77 |
|
|
|
1004 |
|
|
|
86 |
|
68 |
77 |
|
|
|
|
|
93 |
84 |
75 |
|
|
|
940 |
|
|
|
85 |
|
67 |
76 |
|
|
|
|
|
93 |
84 |
74 |
|
|
|
900 |
|
|
|
85 |
|
66 |
75 |
|
|
|
|
|
93 |
83 |
73 |
|
|
|
865 |
|
|
739 |
84 |
|
65 |
75 |
|
|
|
|
|
92 |
82 |
72 |
|
|
|
832 |
|
|
722 |
84 |
|
64 |
74 |
|
|
|
|
|
92 |
81 |
71 |
|
|
|
800 |
|
|
705 |
83 |
|
63 |
73 |
|
|
|
|
|
91 |
80 |
70 |
|
|
|
772 |
|
|
688 |
83 |
|
62 |
72 |
|
|
|
|
|
91 |
79 |
69 |
|
|
|
746 |
|
|
670 |
82 |
|
61 |
72 |
|
|
|
|
|
91 |
79 |
68 |
|
|
|
720 |
|
|
654 |
81 |
|
60 |
71 |
|
|
|
|
|
90 |
78 |
67 |
|
|
|
697 |
|
|
634 |
81 |
|
59 |
70 |
|
|
|
|
|
90 |
77 |
66 |
|
|
|
674 |
|
|
615 |
80 |
|
58 |
69 |
|
|
|
|
|
89 |
76 |
64 |
|
|
|
653 |
|
|
595 |
80 |
|
57 |
69 |
|
|
|
|
|
89 |
75 |
63 |
|
|
|
633 |
|
|
577 |
79 |
|
56 |
68 |
|
|
|
|
|
88 |
74 |
62 |
|
|
|
613 |
|
|
560 |
79 |
120 |
55 |
67 |
|
|
|
|
|
88 |
73 |
61 |
|
|
|
595 |
|
|
543 |
78 |
120 |
54 |
66 |
|
|
|
|
|
87 |
72 |
60 |
|
|
|
577 |
|
|
523 |
78 |
119 |
53 |
65 |
|
|
|
|
|
87 |
71 |
59 |
|
|
|
560 |
|
|
512 |
77 |
119 |
52 |
65 |
|
|
|
|
|
86 |
70 |
57 |
|
|
|
544 |
|
|
496 |
77 |
118 |
51 |
64 |
|
|
|
|
|
86 |
69 |
56 |
|
|
|
528 |
|
|
481 |
76 |
117 |
50 |
63 |
|
|
|
|
|
86 |
69 |
55 |
|
|
|
513 |
|
|
469 |
75 |
117 |
49 |
62 |
|
|
|
|
|
85 |
68 |
54 |
|
|
|
498 |
|
|
455 |
75 |
116 |
48 |
61 |
|
|
|
|
|
85 |
67 |
53 |
|
|
|
484 |
|
|
443 |
74 |
116 |
47 |
61 |
|
|
|
|
|
84 |
66 |
51 |
|
|
|
471 |
|
|
432 |
74 |
115 |
46 |
60 |
|
|
|
|
|
84 |
65 |
50 |
|
|
|
458 |
|
|
421 |
73 |
115 |
45 |
59 |
|
|
|
|
|
83 |
64 |
49 |
|
|
|
446 |
|
|
409 |
73 |
114 |
44 |
59 |
|
|
|
|
|
83 |
63 |
48 |
|
|
|
434 |
|
|
400 |
72 |
113 |
43 |
58 |
|
|
|
|
|
82 |
62 |
47 |
|
|
|
423 |
|
|
390 |
72 |
113 |
42 |
57 |
|
|
|
|
|
82 |
61 |
46 |
|
|
|
412 |
|
|
381 |
71 |
112 |
41 |
56 |
|
|
|
|
|
81 |
60 |
44 |
|
|
|
402 |
|
|
371 |
71 |
112 |
40 |
55 |
|
|
|
|
|
80 |
60 |
43 |
|
|
|
392 |
|
|
362 |
70 |
111 |
39 |
55 |
|
|
|
|
|
80 |
59 |
42 |
|
|
|
382 |
|
|
353 |
70 |
110 |
38 |
54 |
|
|
|
|
|
79 |
58 |
41 |
|
|
|
372 |
|
|
344 |
69 |
110 |
37 |
53 |
|
|
|
|
|
79 |
57 |
40 |
|
|
|
363 |
|
|
336 |
69 |
109 |
36 |
52 |
|
|
|
|
|
78 |
56 |
38 |
|
|
|
354 |
|
|
327 |
68 |
109 |
35 |
52 |
|
|
|
|
|
78 |
55 |
37 |
|
|
|
345 |
|
|
319 |
68 |
108 |
34 |
51 |
|
|
|
|
|
77 |
54 |
36 |
|
|
|
336 |
|
|
311 |
67 |
108 |
33 |
50 |
|
|
|
|
|
77 |
53 |
35 |
|
|
|
327 |
|
|
301 |
67 |
107 |
32 |
49 |
|
|
|
|
|
76 |
52 |
34 |
|
|
|
318 |
|
|
294 |
66 |
106 |
31 |
48 |
|
|
91 |
|
|
76 |
51 |
33 |
|
|
|
310 |
|
|
286 |
66 |
105 |
30 |
48 |
|
|
91 |
|
|
75 |
50 |
31 |
|
|
|
302 |
|
|
279 |
65 |
104 |
29 |
47 |
|
|
89 |
|
|
75 |
50 |
30 |
|
|
|
294 |
|
|
271 |
65 |
104 |
28 |
46 |
|
|
88 |
|
|
74 |
49 |
29 |
|
|
|
286 |
|
|
264 |
64 |
103 |
27 |
45 |
|
|
87 |
|
|
73 |
48 |
28 |
|
|
|
279 |
|
|
258 |
64 |
103 |
26 |
45 |
|
|
86 |
|
|
73 |
47 |
27 |
|
|
|
272 |
|
|
253 |
63 |
102 |
25 |
44 |
|
|
85 |
|
|
72 |
46 |
26 |
|
|
|
266 |
|
|
247 |
63 |
101 |
24 |
43 |
|
|
84 |
|
|
72 |
45 |
24 |
|
|
|
260 |
|
201 |
240 |
62 |
100 |
23 |
42 |
|
|
83 |
|
|
71 |
44 |
23 |
93 |
82 |
72 |
254 |
|
195 |
234 |
62 |
99 |
22 |
42 |
|
|
81 |
|
|
71 |
43 |
22 |
93 |
82 |
71 |
248 |
|
189 |
228 |
61 |
98 |
21 |
41 |
|
|
79 |
|
|
70 |
42 |
21 |
93 |
81 |
70 |
243 |
|
184 |
222 |
61 |
97 |
20 |
40 |
|
|
78 |
|
|
69 |
42 |
20 |
92 |
81 |
69 |
238 |
|
181 |
218 |
60 |
97 |
19 |
|
|
|
77 |
|
|
|
|
|
92 |
80 |
69 |
234 |
|
179 |
214 |
59 |
96 |
18 |
|
|
|
76 |
|
|
|
|
|
92 |
80 |
68 |
230 |
|
177 |
210 |
59 |
96 |
17 |
|
|
|
75 |
|
|
|
|
|
92 |
80 |
68 |
226 |
|
175 |
208 |
58 |
95 |
16 |
|
|
|
74 |
|
|
|
|
|
92 |
79 |
67 |
222 |
|
171 |
205 |
58 |
95 |
15 |
|
|
|
73 |
|
|
|
|
|
92 |
79 |
67 |
217 |
|
169 |
203 |
58 |
94 |
14 |
|
|
|
73 |
|
|
|
|
|
91 |
79 |
66 |
213 |
|
167 |
200 |
57 |
93 |
13 |
|
|
|
71 |
|
|
|
|
|
91 |
78 |
66 |
208 |
|
163 |
195 |
57 |
92 |
12 |
|
|
|
70 |
|
100 |
|
|
|
91 |
78 |
65 |
204 |
|
162 |
193 |
56 |
92 |
11 |
|
|
|
69 |
|
100 |
|
|
|
91 |
77 |
64 |
200 |
|
160 |
190 |
56 |
91 |
10 |
|
|
|
68 |
|
100 |
|
|
|
90 |
77 |
64 |
196 |
|
157 |
185 |
56 |
90 |
9 |
|
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