To orodje omogoča pretvorbo vrednosti trdote v različne lestvice: Brinell (HB), Vickers (HV) in Rockwell C (HRC). Temelji na podatkih za pretvorbo trdote za neavstenitna jekla iz standarda ASTM E140 (Tabela 1).
Tabela pretvorbe
| Število trdote Rockwell C 150 kg (HRC) | Število trdote Vickers (HV) | Število trdote Brinell, standardna krogla 10 mm, 3000 kg (HBS) | Število trdote Brinell, karbidna krogla 10 mm, 3000 kg (HBW) |
|---|---|---|---|
| 68 | 940 | - | - |
| 67 | 900 | - | - |
| 66 | 865 | - | - |
| 65 | 832 | - | (739) |
| 64 | 800 | - | (722) |
| 63 | 772 | - | (705) |
| 62 | 746 | - | (688) |
| 61 | 720 | - | (670) |
| 60 | 697 | - | (654) |
| 59 | 674 | - | 634 |
| 58 | 653 | - | 615 |
| 57 | 633 | - | 595 |
| 56 | 613 | - | 577 |
| 55 | 595 | - | 560 |
| 54 | 577 | - | 543 |
| 53 | 560 | - | 525 |
| 52 | 544 | (500) | 512 |
| 51 | 528 | (487) | 496 |
| 50 | 513 | (475) | 481 |
| 49 | 498 | (464) | 469 |
| 48 | 484 | 451 | 455 |
| 47 | 471 | 442 | 443 |
| 46 | 458 | 432 | 432 |
| 45 | 446 | 421 | 421 |
| 44 | 434 | 409 | 409 |
| 43 | 423 | 400 | 400 |
| 42 | 412 | 390 | 390 |
| 41 | 402 | 381 | 381 |
| 40 | 392 | 371 | 371 |
| 39 | 382 | 362 | 362 |
| 38 | 372 | 353 | 353 |
| 37 | 363 | 344 | 344 |
| 36 | 354 | 336 | 336 |
| 35 | 345 | 327 | 327 |
| 34 | 336 | 319 | 319 |
| 33 | 327 | 311 | 311 |
| 32 | 318 | 301 | 301 |
| 31 | 310 | 294 | 294 |
| 30 | 302 | 286 | 286 |
| 29 | 294 | 279 | 279 |
| 28 | 286 | 271 | 271 |
| 27 | 279 | 264 | 264 |
| 26 | 272 | 258 | 258 |
| 25 | 266 | 253 | 253 |
| 24 | 260 | 247 | 247 |
| 23 | 254 | 243 | 243 |
| 22 | 248 | 237 | 237 |
| 21 | 243 | 231 | 231 |
| 20 | 238 | 226 | 226 |
Ing. Giacomo Bordiga
