|
|
|
|
Comparison of Metal Hardness Scales
|
Rockwell C |
Rockwell B |
Rockwell A |
15N |
30N |
Brinell |
Vickers |
Knoop |
Shore |
~ Tensile (ksi) |
67 |
NA |
85 |
93 |
83.5 |
NA |
900 |
895 |
95 |
NA |
66 |
NA |
84.5 |
92.5 |
83 |
NA |
865 |
870 |
92 |
NA |
65 |
NA |
83.9 |
92 |
82 |
739 |
832 |
846 |
91 |
NA |
64 |
NA |
83.4 |
NA |
81 |
722 |
800 |
822 |
88 |
NA |
63 |
NA |
82.8 |
91.5 |
80 |
705 |
772 |
799 |
87 |
NA |
62 |
NA |
82.3 |
91 |
79 |
688 |
746 |
776 |
85 |
NA |
61 |
NA |
81.8 |
90.5 |
78.5 |
670 |
720 |
754 |
83 |
NA |
60 |
NA |
81.2 |
90 |
77.5 |
654 |
697 |
732 |
81 |
NA |
59 |
NA |
80.7 |
89.5 |
76.5 |
634 |
674 |
710 |
80 |
326 |
58 |
NA |
80.1 |
NA |
75.5 |
615 |
653 |
690 |
78 |
315 |
57 |
NA |
79.6 |
89 |
75 |
595 |
633 |
670 |
76 |
305 |
56 |
NA |
79 |
88.5 |
74 |
577 |
613 |
650 |
75 |
295 |
55 |
NA |
78.5 |
88 |
73 |
560 |
595 |
630 |
74 |
287 |
54 |
NA |
78 |
87.5 |
72 |
543 |
577 |
612 |
72 |
278 |
53 |
NA |
77.4 |
87 |
71 |
525 |
560 |
594 |
71 |
269 |
52 |
NA |
76.8 |
86.5 |
70.5 |
512 |
544 |
576 |
69 |
262 |
51 |
NA |
76.3 |
86 |
69.5 |
496 |
528 |
558 |
68 |
253 |
50 |
NA |
75.9 |
85.5 |
68.5 |
481 |
513 |
542 |
67 |
245 |
49 |
NA |
75.2 |
85 |
67.5 |
469 |
498 |
526 |
66 |
239 |
48 |
NA |
74.7 |
84.5 |
66.5 |
455 |
484 |
510 |
64 |
232 |
47 |
NA |
74.1 |
84 |
66 |
443 |
471 |
495 |
63 |
225 |
46 |
NA |
73.6 |
83.5 |
65 |
432 |
458 |
480 |
62 |
219 |
45 |
NA |
73.1 |
83 |
64 |
421 |
446 |
466 |
60 |
212 |
44 |
NA |
72.5 |
82.5 |
63 |
409 |
434 |
452 |
58 |
206 |
43 |
NA |
72 |
NA |
NA |
400 |
423 |
NA |
57 |
201 |
42 |
NA |
71.5 |
81.5 |
61.5 |
390 |
412 |
426 |
56 |
196 |
41 |
NA |
70.9 |
NA |
NA |
381 |
402 |
NA |
55 |
191 |
40 |
NA |
70.5 |
80.5 |
59.5 |
371 |
392 |
402 |
54 |
186 |
39 |
NA |
69.9 |
NA |
NA |
362 |
382 |
NA |
52 |
181 |
38 |
NA |
69.4 |
79.5 |
57.5 |
353 |
372 |
380 |
51 |
176 |
37 |
NA |
68.9 |
NA |
NA |
344 |
363 |
NA |
50 |
172 |
36 |
109 |
68.4 |
78.5 |
56 |
336 |
354 |
360 |
49 |
168 |
35 |
108.5 |
67.9 |
NA |
NA |
327 |
345 |
NA |
48 |
163 |
34 |
108 |
67.4 |
77 |
54 |
319 |
336 |
342 |
47 |
159 |
33 |
107.5 |
66.8 |
NA |
NA |
311 |
327 |
NA |
46 |
154 |
32 |
107 |
66.3 |
76 |
52 |
301 |
318 |
326 |
44 |
150 |
31 |
106 |
65.8 |
NA |
NA |
294 |
310 |
NA |
43 |
146 |
30 |
105.5 |
65.3 |
75 |
50.5 |
286 |
302 |
311 |
42 |
142 |
29 |
104.5 |
64.7 |
NA |
NA |
279 |
294 |
NA |
41 |
138 |
28 |
104 |
64.3 |
74 |
48.5 |
271 |
286 |
297 |
41 |
134 |
27 |
103 |
63.8 |
NA |
NA |
264 |
279 |
NA |
40 |
131 |
26 |
102.5 |
63.3 |
72.5 |
47 |
258 |
272 |
284 |
38 |
127 |
25 |
101.5 |
62.8 |
NA |
NA |
253 |
266 |
NA |
38 |
124 |
24 |
101 |
62.4 |
71.5 |
45 |
247 |
260 |
272 |
37 |
121 |
23 |
100 |
62 |
NA |
NA |
243 |
254 |
NA |
36 |
118 |
22 |
99 |
61.5 |
70.5 |
43 |
237 |
248 |
261 |
35 |
115 |
21 |
98.5 |
61 |
NA |
NA |
231 |
243 |
NA |
35 |
113 |
20 |
97.8 |
61.5 |
69.5 |
41.5 |
226 |
238 |
251 |
34 |
110 |
Comparison of Elastomer Hardness Scales
|
A |
B |
C |
D |
O |
OO |
100 |
85 |
77 |
58 |
NA |
NA |
95 |
81 |
70 |
46 |
NA |
NA |
90 |
76 |
59 |
39 |
NA |
NA |
85 |
71 |
52 |
33 |
NA |
NA |
80 |
66 |
47 |
29 |
84 |
98 |
75 |
62 |
42 |
25 |
79 |
97 |
70 |
56 |
37 |
22 |
75 |
95 |
65 |
51 |
32 |
19 |
72 |
94 |
60 |
47 |
28 |
16 |
69 |
93 |
55 |
42 |
24 |
14 |
65 |
91 |
50 |
37 |
20 |
12 |
61 |
90 |
45 |
32 |
17 |
10 |
57 |
88 |
40 |
27 |
14 |
8 |
53 |
86 |
35 |
22 |
12 |
7 |
48 |
83 |
30 |
17 |
9 |
6 |
42 |
80 |
25 |
12 |
NA |
NA |
35 |
76 |
20 |
6 |
NA |
NA |
28 |
70 |
15 |
NA |
NA |
NA |
21 |
62 |
10 |
NA |
NA |
NA |
14 |
55 |
5 |
NA |
NA |
NA |
8 |
45 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|