|
Durezze
| Tabella di conversione per acciai al carbonio e legati ASTM A 370 - 03a |
| HRC |
HV |
HB |
HRA |
Rm |
|
HRB |
HV |
HB |
HRA |
Rm |
| Cono |
Vickers |
Brinell |
Cono |
N/mm2 |
|
Sfera |
Vickers |
Brinell |
Cono |
N/mm2 |
| diamante |
30 |
3000 Kgf |
diamante |
Mpa |
|
1/16" |
30 |
3000 Kgf |
diamante |
Mpa |
| 68 |
940 |
-- |
85.6 |
-- |
|
100 |
240 |
240 |
61.5 |
800 |
| 67 |
900 |
-- |
85.0 |
-- |
|
99 |
234 |
234 |
60.9 |
785 |
| 66 |
865 |
-- |
84.5 |
-- |
|
98 |
228 |
228 |
60.2 |
750 |
| 65 |
832 |
739 |
83.9 |
-- |
|
97 |
222 |
222 |
59.5 |
715 |
| 64 |
800 |
722 |
83.4 |
-- |
|
96 |
216 |
216 |
58.9 |
705 |
| 63 |
772 |
706 |
82.8 |
-- |
|
95 |
210 |
210 |
58.3 |
690 |
| 62 |
746 |
688 |
82.3 |
-- |
|
94 |
205 |
205 |
57.6 |
675 |
| 61 |
720 |
670 |
81.8 |
-- |
|
93 |
200 |
200 |
57.0 |
650 |
| 60 |
697 |
654 |
81.2 |
-- |
|
92 |
195 |
195 |
56.4 |
635 |
| 59 |
674 |
634 |
80.7 |
2420 |
|
91 |
190 |
190 |
55.8 |
620 |
| 58 |
653 |
615 |
80.1 |
2330 |
|
90 |
185 |
185 |
55.2 |
615 |
| 57 |
633 |
595 |
79.6 |
2240 |
|
89 |
180 |
180 |
54.6 |
605 |
| 56 |
613 |
577 |
79.0 |
2160 |
|
88 |
176 |
176 |
54.0 |
590 |
| 55 |
595 |
560 |
78.5 |
2070 |
|
87 |
172 |
172 |
53.4 |
580 |
| 54 |
577 |
543 |
78.0 |
2010 |
|
86 |
169 |
169 |
52.8 |
570 |
| 53 |
560 |
525 |
77.4 |
1950 |
|
85 |
165 |
165 |
52.3 |
565 |
| 52 |
544 |
512 |
76.8 |
1880 |
|
84 |
162 |
162 |
51.7 |
560 |
| 51 |
528 |
496 |
76.3 |
1820 |
|
83 |
159 |
159 |
51.1 |
550 |
| 50 |
513 |
482 |
75.9 |
1760 |
|
82 |
156 |
156 |
50.6 |
530 |
| 49 |
498 |
468 |
75.2 |
1700 |
|
81 |
153 |
153 |
50.0 |
505 |
| 48 |
484 |
455 |
74.7 |
1640 |
|
80 |
150 |
150 |
49.5 |
495 |
| 47 |
471 |
442 |
74.1 |
1580 |
|
79 |
147 |
147 |
48.9 |
485 |
| 46 |
458 |
432 |
73.6 |
1520 |
|
78 |
144 |
144 |
48.4 |
475 |
| 45 |
446 |
421 |
73.1 |
1480 |
|
77 |
141 |
141 |
47.9 |
470 |
| 44 |
434 |
409 |
72.5 |
1430 |
|
76 |
139 |
139 |
47.3 |
460 |
| 43 |
423 |
400 |
72.0 |
1390 |
|
75 |
137 |
137 |
46.8 |
455 |
| 42 |
412 |
390 |
71.5 |
1340 |
|
74 |
135 |
135 |
46.3 |
450 |
| 41 |
402 |
381 |
70.9 |
1300 |
|
73 |
132 |
132 |
45.8 |
440 |
| 40 |
392 |
371 |
70.4 |
1250 |
|
72 |
130 |
130 |
45.3 |
435 |
| 39 |
382 |
362 |
69.9 |
1220 |
|
71 |
127 |
127 |
44.8 |
425 |
| 38 |
372 |
353 |
69.4 |
1180 |
|
70 |
125 |
125 |
44.3 |
420 |
| 37 |
363 |
344 |
68.9 |
1140 |
|
69 |
123 |
123 |
43.8 |
415 |
| 36 |
354 |
336 |
68.4 |
1110 |
|
68 |
121 |
121 |
43.3 |
405 |
| 35 |
345 |
327 |
67.9 |
1080 |
|
67 |
119 |
119 |
42.8 |
400 |
| 34 |
336 |
319 |
67.4 |
1050 |
|
66 |
117 |
117 |
42.3 |
395 |
| 33 |
327 |
311 |
66.8 |
1030 |
|
65 |
116 |
116 |
41.8 |
385 |
| 32 |
318 |
301 |
66.3 |
1010 |
|
64 |
114 |
114 |
41.4 |
-- |
| 31 |
310 |
294 |
65.8 |
970 |
|
63 |
112 |
112 |
40.9 |
-- |
| 30 |
302 |
286 |
65.3 |
950 |
|
62 |
110 |
110 |
40.4 |
370 |
| 29 |
294 |
279 |
64.6 |
930 |
|
61 |
108 |
108 |
40.0 |
-- |
| 28 |
286 |
271 |
64.3 |
900 |
|
60 |
107 |
107 |
39.5 |
-- |
| 27 |
279 |
264 |
63.8 |
880 |
|
59 |
106 |
106 |
39.0 |
360 |
| 26 |
272 |
258 |
63.3 |
860 |
|
58 |
104 |
104 |
38.6 |
-- |
| 25 |
266 |
253 |
62.8 |
850 |
|
57 |
103 |
103 |
38.1 |
350 |
| 24 |
260 |
247 |
62.4 |
820 |
|
56 |
101 |
101 |
37.7 |
-- |
| 23 |
254 |
243 |
62.0 |
810 |
|
55 |
100 |
100 |
37.2 |
340 |
| 22 |
248 |
237 |
61.5 |
790 |
|
54 |
-- |
-- |
36.8 |
-- |
| 21 |
243 |
231 |
61.0 |
770 |
|
51 |
-- |
94 |
35.5 |
330 |
| 20 |
238 |
226 |
60.5 |
760 |
|
49 |
-- |
92 |
34.6 |
320 |
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