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தமிழ் 
བོད་ཡིག Valor de conversió aproximat de l'acer Rockwell C duresa＊1
|
(HRC) Escala C de Rockwell duresa |
(HV) Vickers duresa |
Duresa Brinell (HB) bola de 10 mm càrrega 3000kgf | Duresa Rockwell＊3 | Rockwell superficial
duresa; indentador cònic de diamant |
（HS） |
Tracció força＊2 (valor aproximat) MPa |
(HRC)＊3 Escala C de Rockwell duresa |
|||||
| Duresa shore | ||||||||||||
|
Pilota estàndard |
Tungstè bola de carbur |
(JOC) A
escala càrrega 60kgf diamant cònic sagnador |
(HRB) B
càrrega escala 100 kgf diàmetre 1,6 mm (1/16 polzada) bola |
(HRD) D
escala càrrega 100kgf diamant cònic sagnador |
15-N escala càrrega 15kgf | 30-N escala càrrega 30kgf | 45-N escala càrrega 45kgf | |||||
| 68 | 940 | – | – | 85.6 | – | 76.9 | 93.2 | 84.4 | 75.4 | 97 | – | 68 |
| 67 | 900 | – | – | 85.0 | – | 76.1 | 92.9 | 83.6 | 74.2 | 95 | – | 67 |
| 66 | 865 | – | – | 84.5 | – | 75.4 | 92.5 | 82.8 | 73.3 | 92 | – | 66 |
| 65 | 832 | – | (739) | 83.9 | – | 74.5 | 92.2 | 81.9 | 72.0 | 91 | – | 65 |
| 64 | 800 | – | (722) | 83.4 | – | 73.8 | 91.8 | 81.1 | 71.0 | 88 | – | 64 |
| 63 | 772 | – | (705) | 82.8 | – | 73.0 | 91.4 | 80.1 | 69.9 | 87 | – | 63 |
| 62 | 746 | – | (688) | 82.3 | – | 72.2 | 91.1 | 79.3 | 68.8 | 85 | – | 62 |
| 61 | 720 | – | (670) | 81.8 | – | 71.5 | 90.7 | 78.4 | 67.7 | 83 | – | 61 |
| 60 | 697 | – | (654) | 81.2 | – | 70.7 | 90.2 | 77.5 | 66.6 | 81 | – | 60 |
| 59 | 674 | – | (634) | 80.7 | – | 69.9 | 89.8 | 76.6 | 65.5 | 80 | – | 59 |
| 58 | 653 | 615 | 80.1 | 69.2 | 89.3 | 75.7 | 64.3 | 78 | 58 | |||
| 57 | 633 | 595 | 79.6 | 68.5 | 88.9 | 74.8 | 63.2 | 76 | 57 | |||
| 56 | 613 | 577 | 79.0 | 67.7 | 88.3 | 73.9 | 62.0 | 75 | 56 | |||
| 55 | 595 | 560 | 78.5 | 66.9 | 87.9 | 73.0 | 60.9 | 74 | 2075 | 55 | ||
| 54 | 577 | 543 | 78.0 | 66.1 | 87.4 | 72.0 | 59.8 | 72 | 2015 | 54 | ||
| 53 | 560 | – | 525 | 77.4 | – | 65.4 | 86.9 | 71.2 | 58.6 | 71 | 1950 | 53 |
| 52 | 544 | （500） | 512 | 76.8 | – | 64.6 | 86.4 | 70.2 | 57.4 | 69 | 1880 | 52 |
| 51 | 528 | (487) | 496 | 76.3 | – | 63.8 | 85.9 | 69.4 | 56.1 | 68 | 1820 | 51 |
| 50 | 513 | (475) | 481 | 75.9 | – | 63.1 | 85.5 | 68.5 | 55.0 | 67 | 1760 | 50 |
| 49 | 498 | （464） | 469 | 75.2 | – | 62.1 | 85.0 | 67.6 | 53.8 | 66 | 1695 | 49 |
| 48 | 484 | 451 | 455 | 74.7 | – | 61.4 | 84.5 | 66.7 | 52.5 | 64 | 1635 | 48 |
| 47 | 471 | 442 | 443 | 74.1 | – | 60.8 | 83.9 | 65.8 | 51.4 | 63 | 1580 | 47 |
| 46 | 458 | 432 | 432 | 73.6 | – | 60.0 | 83.5 | 64.8 | 50.3 | 62 | 1530 | 46 |
| 45 | 446 | 421 | 421 | 73.1 | – | 59.2 | 83.0 | 64.0 | 49.0 | 60 | 1480 | 45 |
| 44 | 434 | 409 | 409 | 72.5 | – | 58.5 | 82.5 | 63.1 | 47.8 | 58 | 1435 | 44 |
| 43 | 423 | 400 | 400 | 72.0 | – | 57.7 | 82.0 | 62.2 | 46.7 | 57 | 1385 | 43 |
| 42 | 412 | 390 | 390 | 71.5 | – | 56.9 | 81.5 | 61.3 | 45.5 | 56 | 1340 | 42 |
| 41 | 402 | 381 | 381 | 70.9 | – | 56.2 | 80.9 | 60.4 | 44.3 | 55 | 1295 | 41 |
| 40 | 392 | 371 | 371 | 70.4 | – | 55.4 | 80.4 | 59.5 | 43.1 | 54 | 1250 | 40 |
| 39 | 382 | 362 | 362 | 69.9 | – | 54.6 | 79.9 | 58.6 | 41.9 | 52 | 1215 | 39 |
| 38 | 372 | 353 | 353 | 69.4 | – | 53.8 | 79.4 | 57.7 | 40.8 | 51 | 1180 | 38 |
| 37 | 363 | 344 | 344 | 68.9 | – | 53.1 | 78.8 | 56.8 | 39.6 | 50 | 1160 | 37 |
| 36 | 354 | 336 | 336 | 68.4 | （109,0） | 52.3 | 78.3 | 55.9 | 38.4 | 49 | 1115 | 36 |
| 35 | 345 | 327 | 327 | 67.9 | (108,5) | 51.5 | 77.7 | 55.0 | 37.2 | 48 | 1080 | 35 |
| 34 | 336 | 319 | 319 | 67.4 | （108,0） | 50.8 | 77.2 | 54.2 | 36.1 | 47 | 1055 | 34 |
| 33 | 327 | 311 | 311 | 66.8 | （107,5） | 50.0 | 76.6 | 53.3 | 34.9 | 46 | 1025 | 33 |
| 32 | 318 | 301 | 301 | 66.3 | (107,0) | 49.2 | 76.1 | 52.1 | 33.7 | 44 | 1000 | 32 |
| 31 | 310 | 294 | 294 | 65.8 | （106,0） | 48.4 | 75.6 | 51.3 | 32.5 | 43 | 980 | 31 |
| 30 | 302 | 286 | 286 | 65.3 | (105,5) | 47.7 | 75.0 | 50.4 | 31.3 | 42 | 950 | 30 |
| 29 | 294 | 279 | 279 | 64.7 | (104,5) | 47.0 | 74.5 | 49.5 | 30.1 | 41 | 930 | 29 |
| 28 | 286 | 271 | 271 | 64.3 | （104,0） | 46.1 | 73.9 | 48.6 | 28.9 | 41 | 910 | 28 |
| 27 | 279 | 264 | 264 | 63.8 | （103,0） | 45.2 | 73.3 | 47.7 | 27.8 | 40 | 880 | 27 |
| 26 | 272 | 258 | 258 | 63.3 | (102,5) | 44.6 | 72.8 | 46.8 | 26.7 | 38 | 860 | 26 |
| 25 | 266 | 253 | 253 | 62.8 | （101,5） | 43.8 | 72.2 | 45.9 | 25.5 | 38 | 840 | 25 |
| 24 | 260 | 247 | 247 | 62.4 | （101.0） | 43.1 | 71.6 | 45.0 | 24.3 | 37 | 825 | 24 |
| 23 | 254 | 243 | 243 | 62.0 | 100.0 | 42.1 | 71.0 | 44.0 | 23.1 | 36 | 805 | 23 |
| 22 | 248 | 237 | 237 | 61.5 | 99.0 | 41.6 | 70.5 | 43.2 | 22.0 | 35 | 785 | 22 |
| 21 | 243 | 231 | 231 | 61.0 | 98.5 | 40.9 | 69.9 | 42.3 | 20.7 | 35 | 770 | 21 |
| 20 | 238 | 226 | 226 | 60.5 | 97.8 | 40.1 | 69.4 | 41.5 | 19.6 | 34 | 760 | 20 |
| (18) | 230 | 219 | 219 | – | 96.7 | – | – | – | – | 33 | 730 | (18) |
| (16) | 222 | 212 | 212 | – | 95.5 | – | – | – | – | 32 | 705 | (16) |
| (14) | 213 | 203 | 203 | – | 93.9 | – | – | – | – | 31 | 675 | (14) |
| (12) | 204 | 194 | 194 | – | 92.3 | – | – | – | – | 29 | 650 | (12) |
| (10) | 196 | 187 | 187 | – | 90.7 | – | – | – | – | 28 | 620 | (10) |
| (8) | 188 | 179 | 179 | – | 89.5 | – | – | – | – | 27 | 600 | (8) |
| (6) | 180 | 171 | 171 | – | 87.1 | – | – | – | – | 26 | 580 | (6) |
| （4） | 173 | 165 | 165 | – | 85.5 | – | – | – | – | 25 | 550 | （4） |
| (2) | 166 | 158 | 158 | – | 83.5 | – | – | – | – | 24 | 530 | (2) |
| （0） | 160 | 152 | 152 | – | 81.7 | – | – | – | – | 24 | 515 | （0） |
* 1 Els nombres en negreta són segons ASTM E 140 Taula 1 (organitzat conjuntament per SAE, ASM i ASTM). *2 1MPa = 1N/mm2
*3 El valor entre parèntesis a la taula correspon a intervals que s'utilitzen rarament i s'indica com a referència.
