Hardness comparison table
硬度對照表
洛式硬度 (HRC) | 勃式硬度 (HB) | 維式硬度 (HV) | 蕭式硬度 (HS) | 抗拉強度(N/MM2) |
14 | 203 | 213 | 31 | 684 |
16 | 212 | 222 | 32 | 712 |
18 | 219 | 230 | 33 | 740 |
20 | 226 | 238 | 34 | 764 |
21 | 231 | 243 | 35 | 779 |
22 | 237 | 248 | 36 | 794 |
23 | 243 | 254 | 37 | 817 |
24 | 247 | 260 | 38 | 835 |
25 | 253 | 266 | 39 | 853 |
26 | 258 | 272 | 40 | 871 |
27 | 264 | 279 | 41 | 896 |
28 | 271 | 286 | 42 | 918 |
29 | 279 | 294 | 43 | 946 |
30 | 286 | 302 | 44 | 973 |
31 | 294 | 310 | 45 | 995 |
32 | 301 | 318 | 46 | 1023 |
33 | 311 | 327 | 47 | 1051 |
34 | 319 | 336 | 48 | 1081 |
35 | 327 | 345 | 49 | 1110 |
36 | 336 | 354 | 50 | 1137 |
37 | 344 | 363 | 51 | 1165 |
38 | 353 | 372 | 52 | 1199 |
39 | 362 | 382 | 53 | 1227 |
40 | 371 | 392 | 54 | 1262 |
41 | 381 | 402 | 55 | 1296 |
42 | 390 | 412 | 56 | 1326 |
43 | 400 | 423 | 57 | 1360 |
44 | 409 | 434 | 58 | 1399 |
45 | 421 | 446 | 60 | 1441 |
46 | 432 | 458 | 62 | 1469 |
47 | 442 | 471 | 63 | 1524 |
48 | 451 | 484 | 64 | 1571 |
49 | 464 | 498 | 66 | 1623 |
50 | 475 | 513 | 67 | 1675 |
51 | 487 | 528 | 68 | 1732 |
52 | 500 | 544 | 69 | 1789 |
53 | - | 560 | 71 | 1845 |
54 | - | 577 | 72 | 1908 |
55 | - | 595 | 74 | 1975 |
56 | - | 613 | 75 | 2042 |
57 | - | 633 | 76 | 2117 |
58 | - | 653 | 78 | - |
59 | - | 674 | 81 | - |
60 | - | 697 | 81 | - |
61 | - | 720 | 83 | - |
62 | - | 746 | 85 | - |
63 | - | 772 | 87 | - |
64 | - | 800 | 88 | - |
65 | - | 832 | 91 | - |
66 | - | 865 | 92 | - |
67 | - | 900 | 95 | - |
68 | - | 940 | 97 | - |