Engineering reference · Interactive tool
Compare common hardness scales, explore cemented-carbide substrate trade-offs and generate a clean technical report for the shop floor.
Reference: ASTM E140 / ISO 18265Enter a value and choose its source scale.
Educational trend model for WC–Co grades.
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| Material / condition | HRA | HRC | HV | HBW | Typical context |
|---|---|---|---|---|---|
| Cemented tungsten carbide · indicative grade data | |||||
| Ultra-hard finishing carbide | 93.5 | — | 1800 | — | Fine finishing / wear |
| Micro-grain precision carbide | 92.0 | — | 1600 | — | Precision cutting |
| General-purpose carbide | 90.5 | — | 1450 | — | General machining |
| Tough roughing carbide | 89.0 | — | 1300 | — | Interrupted cuts |
| Tool steels and alloy steels · approximate equivalents | |||||
| HSS M42 | 84.5 | 66 | 865 | — | Drills / taps |
| Hardened tool-holder shank | 81.2 | 60 | 697 | 654 | Holder bodies |
| Hardened alloy steel | 76.4 | 52 | 544 | 512 | Machine components |
| Medium-tough steel | 75.9 | 50 | 513 | 481 | Standard bodies |
| Pre-hardened steel | 71.0 | 40 | 392 | 371 | Molds / holders |
| Annealed alloy steel | 61.5 | 20 | 238 | 225 | Pre-machining |
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