Metal Hardness & Tensile Strength Conversion Chart (Rm, HV, HRC)
Consult our metallurgical equivalence chart (Rm, Vickers, Rockwell C) and rely on Filame's engineering expertise for material selection and design of springs and stamped components.
The following table shows, as a first approximation and under reserve, the equivalence between hardness in Vickers (HV), Rockwell C (HRC) and mechanical strength, Rm (N/mm2) for the various metallic materials (steel and stainless steel).
| RM (N/mm²) | HV | HRC | RM (N/mm²) | HV | HRC | RM (N/mm²) | HV | HRC |
|---|---|---|---|---|---|---|---|---|
| 300 | 89.7 | - | 1100 | 337.2 | 34.2 | 1900 | 584.6 | 54.4 |
| 325 | 97.4 | - | 1125 | 344.9 | 35.0 | 1925 | 592.4 | 54.8 |
| 350 | 105.2 | - | 1150 | 352.6 | 35.8 | 1950 | 600.1 | 55.2 |
| 375 | 112.9 | - | 1175 | 360.4 | 36.6 | 1975 | 607.8 | 55.6 |
| 400 | 120.6 | - | 1200 | 368.1 | 37.5 | 2000 | 615.6 | 56.1 |
| 425 | 128.4 | - | 1225 | 375.8 | 38.2 | 2025 | 623.3 | 56.6 |
| 450 | 136.1 | - | 1250 | 383.6 | 39.1 | 2050 | 631.0 | 57.2 |
| 475 | 143.8 | - | 1275 | 391.3 | 40.0 | 2075 | 638.8 | 57.3 |
| 500 | 151.6 | - | 1300 | 399.0 | 40.8 | 2100 | 646.5 | 57.6 |
| 525 | 159.3 | - | 1325 | 406.8 | 41.3 | 2125 | 654.2 | 57.8 |
| 550 | 167.0 | - | 1350 | 414.5 | 42.2 | 2150 | 662.0 | 58.1 |
| 575 | 174.8 | - | 1375 | 422.2 | 42.9 | 2175 | 669.7 | 58.5 |
| 600 | 182.5 | - | 1400 | 430.0 | 43.6 | 2200 | 677.4 | 58.9 |
| 625 | 190.2 | - | 1425 | 437.7 | 44.2 | 2225 | 685.2 | 59.3 |
| 650 | 198.0 | - | 1450 | 445.4 | 44.9 | 2250 | 692.9 | 59.7 |
| 675 | 205.7 | - | 1475 | 453.2 | 45.6 | 2275 | 700.6 | 60.1 |
| 700 | 213.4 | - | 1500 | 460.9 | 46.2 | 2300 | 708.4 | 60.4 |
| 725 | 221.2 | - | 1525 | 468.6 | 46.8 | 2325 | 716.1 | 60.7 |
| 750 | 228.9 | - | 1550 | 476.4 | 47.3 | 2350 | 723.8 | 61.0 |
| 775 | 236.6 | - | 1575 | 484.1 | 48.0 | 2375 | 731.6 | 61.3 |
| 800 | 244.4 | 21.3 | 1600 | 491.8 | 48.7 | 2400 | 739.3 | 61.7 |
| 825 | 252.1 | 23.0 | 1625 | 499.6 | 49.1 | 2425 | 747.0 | 62.0 |
| 850 | 259.8 | 24.0 | 1650 | 507.3 | 49.3 | 2450 | 754.8 | 62.3 |
| 875 | 267.6 | 24.9 | 1675 | 515.0 | 50.0 | 2475 | 762.5 | 62.6 |
| 900 | 275.3 | 26.4 | 1700 | 522.8 | 50.8 | 2500 | 770.2 | 62.8 |
| 925 | 283.0 | 27.6 | 1725 | 530.5 | 51.2 | 2525 | 778.0 | 63.0 |
| 950 | 290.8 | 28.6 | 1750 | 538.2 | 51.6 | 2550 | 785.7 | 63.3 |
| 975 | 298.5 | 29.5 | 1775 | 546.0 | 52.2 | 2575 | 793.4 | 63.6 |
| 1000 | 306.2 | 30.6 | 1800 | 553.7 | 52.8 | 2600 | 801.2 | 64.0 |
| 1025 | 314.0 | 31.6 | 1825 | 561.4 | 53.2 | 2625 | 808.9 | 64.3 |
| 1050 | 321.7 | 32.3 | 1850 | 569.2 | 53.7 | 2650 | 816.6 | 64.6 |
| 1075 | 329.4 | 33.2 | 1875 | 576.9 | 54.1 | 2675 | 824.4 | 64.9 |
Source: https://www.matthey.ch/aide-technique/equivalence-durete-/-resistance
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