Choosing the right tool for material, operation, and surface finish requirements
| ISO Grade | Material Group | Hardness (HRA) |
|---|---|---|
| K10-K20 | Cast iron, hardened steel | 91-93 |
| M10-M20 | Stainless steel, ductile iron | 90-92 |
| P10-P30 | General steel | 89-91 |
| N10-N20 | Aluminum, non-ferrous | 88-90 |
| Coating | Max Temp | Best For |
|---|---|---|
| TiN (Gold) | 600C | General, low friction |
| TiAlN | 800C | Steel, high temp |
| AlTiN | 900C | Hard materials >45HRC |
| CVD Diamond | 700C | Composites, abrasive |