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.
Hardness Conversion Table: Tensile Strength (Rm), Vickers (HV) & Rockwell C (HRC)
The following hardness conversion table establishes, as a reference and in accordance with ISO 18265 standards, the equivalence between Vickers hardness (HV), Rockwell C hardness (HRC), and ultimate tensile strength Rm (N/mm² or MPa) for carbon steels, alloy steels, and stainless steels.
This metallurgical equivalence chart serves as a primary reference for calculating the dimensions of precision technical springs, stamped parts, and verifying heat treatment (hardening and tempering) specifications.
| 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
Production capacities
Discover Filame's production capabilities in Metal Hardness & Tensile Strength Conversion Chart (Rm, HV, HRC):
