| ISO | Material | Material Designation | Material Condition | Hardness | Cutting Speed Recommendations (Vc) |
| S | 31 | High temp. alloys Fe based | Annealed | 200 HB | 295-655 sfm |
| S | 32 | High temp. alloys Fe based | Hardened | 280 HB | 295-655 sfm |
| S | 33 | High temp. alloys Ni or Co based | Annealed | 250 HB | 295-655 sfm |
| S | 34 | High temp. alloys. Ni or Co based | Hardened | 350 HB | 295-655 sfm |
| S | 35 | High temp. alloys. Ni or Co based | Cast | 320 HB | 295-655 sfm |