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HARDNESS CONVERSION TABLE FOR METALS
| Vickers Hv |
HB | Rockwell | Rockwell Super-ficial | Shore Hs |
Temsile Stemgth KG/mm2 |
|||||
| HRA | HRB | HRC | HRD | 15-N | 30-N | 45-N | ||||
| 940 920 900 880 860 |
--- --- --- --- --- |
85.6 85.3 85.0 84.7 84.4 |
--- --- --- --- --- |
68.0 67.5 67.0 66.4 65.9 |
76.9 76.5 76.1 75.7 75.3 |
93.2 93.0 92.9 92.7 95.0 |
84.4 84.0 83.6 83.1 82.7 |
75.4 74.8 74.2 73.6 73.1 |
97 96 95 93 92 |
--- --- --- --- --- |
| 840 820 800 780 760 |
--- --- --- --- --- |
84.1 83.8 83.4 83.0 82.6 |
--- --- --- --- --- |
65.3 64.7 64.0 63.3 62.5 |
74.8 74.3 73.8 73.3 72.6 |
92.3 92.1 91.8 91.5 91.2 |
82.2 81.1 81.1 80.4 79.7 |
72.2 71.8 71.0 70.2 69.4 |
91 90 88 87 86 |
--- --- --- --- --- |
| 740 720 700 690 680 |
--- --- --- --- --- |
82.2 81.8 81.3 81.1 80.8 |
--- --- --- --- --- |
61.8 61.0 60.1 59.7 59.2 |
72.1 71.5 70.8 70.5 70.1 |
91.0 90.7 90.3 90.1 89.8 |
79.1 78.4 77.6 77.2 76.8 |
68.6 67.7 66.7 66.2 75.7 |
84 83 81 --- 80 |
--- --- --- --- --- |
| 670 660 650 640 630 |
--- --- --- --- --- |
80.6 80.3 80.0 79.8 79.5 |
--- --- --- --- --- |
58.8 58.3 57.8 57.3 56.8 |
69.8 69.4 69.0 68.7 68.3 |
89.7 89.5 89.2 89.0 88.8 |
76.4 75.9 75.5 75.1 74.6 |
65.3 64.7 64.1 63.5 63.0 |
--- 79 --- 77 --- |
--- --- --- --- --- |
| 620 610 600 590 580 |
--- --- --- --- --- |
79.2 78.9 78.6 78.4 78.0 |
--- --- --- --- --- |
56.3 55.7 55,2 54.4 54.1 |
67.9 67.5 67.0 66.7 66.2 |
88.5 88.2 88.0 87.8 87.5 |
74.2 73.6 73.2 72.7 72.1 |
62.4 61.7 61.2 60.5 59.9 |
75 --- 74 --- 72 |
--- --- --- 210 206 |
| 570 560 550 540 530 |
--- --- (505) (496) (488) |
77.8 77.4 77.0 76.7 76.4 |
--- --- --- --- --- |
53.6 53.0 52.3 51.7 51.1 |
65.8 65.4 64.8 64.4 63.9 |
87.2 86.9 86.6 86.3 86.0 |
71.7 71.2 70.5 70.0 69.5 |
59.3 58.6 57.8 57.0 56.2 |
--- 71 --- 69 --- |
202 199 194 190 186 |
| 520 510 500 490 480 |
(505) (496) (488) 456 448 |
76.1 75.7 75.3 74.9 74.5 |
--- --- --- --- --- |
50.5 49.8 49.1 48.4 47.7 |
63.5 62.9 62.2 61.6 61.3 |
85.7 85.4 85.0 84.7 84.3 |
69.0 68.3 67.7 67.1 66.4 |
55.6 54.7 53.9 53.1 52.2 |
67 --- 66 --- 64 |
83 179 174 169 165 |
| 470 460 450 440 430 |
441 433 425 415 405 |
74.1 73.6 73.3 72.8 72.3 |
--- --- --- --- --- |
46.9 46.1 45.3 44.5 43.6 |
60.7 60.1 59.4 58.8 58.2 |
83.9 83.6 83.2 82.8 82.3 |
65.7 64.9 64.3 63.5 62.7 |
51.3 50.4 49.4 48.4 47.4 |
--- 62 --- 59 --- |
160 156 153 149 144 |
| 420 410 400 390 380 |
397 388 379 369 360 |
71.8 71.4 70.8 70.8 69.8 |
--- --- --- --- (110.0) |
42.7 41.8 40.8 39.8 38.8 |
57.5 56.8 56.0 55.2 54.4 |
81.8 81.4 81.0 80.3 79.8 |
61.9 61.1 60.2 59.3 58.4 |
46.4 45.3 44.1 42.9 41.7 |
57 --- 55 --- 52 |
140 136 131 127 123 |
| 370 360 350 300 330 |
350 341| 331 322 313 |
69.2 68.7 68.1 67.6 67.0 |
--- (109.0) --- (108.0) --- |
37.7 36.6 35.5 34.4 33.3 |
53.6 52.8 51.9 51.1 50.2 |
79.2 78.6 78.0 77.4 76.8 |
57.4 56.4 55.4 54.4 53,6 |
40.4 39.1 37.8 36.5 35.2 |
--- 50 --- 47 --- |
120 115 112 109 105 |
| 320 310 300 295 290 |
303 294 284 280 275 |
66.4 65.8 65.2 64.8 64.5 |
(107.0) --- (105.5) --- (104.5) |
32.2 31.0 29.8 29.2 28.5 |
49.4 48.4 47.5 47.1 46.5 |
76.2 75.6 74.9 74.6 72.4 |
52.3 51.3 50.2 49.7 49.0 |
33.9 32.5 31.1 30.4 29.5 |
45 --- 42 --- 41 |
103 100 97 96 94 |
| 285 280 275 270 265 |
270 265 261 256 252 |
64.2 63.8 63.5 63.4 62.7 |
--- (103.5) --- (102.0) --- |
27.8 27.1 26.4 25.6 24.8 |
46.0 45.3 44.9 44.3 43.7 |
73.8 73.4 73.0 72.6 72.1 |
48.4 47.8 47.2 46.4 45.7 |
28.7 27.9 27.1 26.2 25.2 |
--- 40 --- 38 --- |
92 91 89 87 86 |
| 260 255 250 245 240 |
247 243 238 233 228 |
62.4 62.0 61.6 61.2 60.7 |
(101.0) --- 99.5 --- 98.1 |
24.0 23.1 22.2 21.3 20.3 |
43.1 42.2 41.7 41.1 40.3 |
71.6 71.1 70.6 70.1 69.5 |
45.0 44.2 43.4 42.5 41.7 |
24.3 23.2 22.2 21.1 19.9 |
37 --- 36 --- 34 |
84 82 81 79 78 |