首页 › Geometry › Hardness Conversion Calculator
硬度换算器
在任意框输入数值，其他标尺同步换算。
公式
Hardness scales are not linearly related — conversion is done by tabular interpolation per ASTM E140 (steel), not by a formula. Tensile strength ≈ 3.45 × HBW (MPa) for steel.
标尺参数表
| Scale | Indenter | Load | Typical use |
|---|---|---|---|
| HRC — Rockwell C | Diamond cone | 150 kgf | Hardened steel, tools (20–68 HRC) |
| HRA — Rockwell A | Diamond cone | 60 kgf | Carbides, thin hard layers |
| HRB — Rockwell B | 1/16 in steel ball | 100 kgf | Soft steels, aluminum, copper alloys |
| HBW — Brinell | Tungsten carbide ball | 3000 kgf | Unhardened steel, cast iron (older "HB" = same ball type) |
| HV — Vickers | Diamond pyramid | 1–120 kgf | All metals, thin sections, lab reference |
| HK — Knoop | Rhombic diamond | grams–kgf | Microhardness, brittle layers, coatings |
| HS — Shore scleroscope | Drop hammer (rebound) | — | Quick field checks, large rolls |
| HLD — Leeb | Spring impact body (D probe) | — | Portable testing of installed parts |
硬度换算对照表（ASTM E140 钢）
| HRC | HRA | HBW | HV | HK | HS | TS (MPa) |
|---|---|---|---|---|---|---|
| 20 | 60.6 | 226 | 238 | 250 | 34 | 780 |
| 25 | 63.2 | 253 | 268 | 281 | 40 | 873 |
| 30 | 65.9 | 286 | 302 | 317 | 46 | 987 |
| 35 | 68.5 | 327 | 340 | 357 | 52 | 1128 |
| 40 | 71.2 | 371 | 381 | 401 | 58 | 1280 |
| 45 | 73.9 | 421 | 425 | 446 | 64 | 1452 |
| 50 | 76.5 | 481 | 513 | 540 | 71 | 1659 |
| 55 | 79.1 | 560 | 595 | 627 | 79 | 1932 |
| 60 | 81.7 | 654 | 697 | 732 | 87 | 2256 |
| 65 | 84.4 | — | 832 | 874 | 96 | — |
常见问题
硬度换算结果是精确值吗？
不是。不同标尺测量原理不同，换算基于 ASTM E140 表格（钢），为近似值；铝、铸铁、黄铜各有专属表。关键用途请实测。
HB和HBW有什么区别？
字母表示压球材质：HBW=碳化钨球，HBS(已废弃)=钢球。现行标准只用碳化钨球，两者数值相同。