Main group
| Subgroup
| Hardness <=
| SFM [ft/min]
| VRC
|
Steel materials | Common structural steels
| 500 N/mm2
| 607
| 75 - 76 |
1000 N/mm2
| 607
| 75 - 76 |
Free-cutting steels
| 850 N/mm2
| 607
| 75 - 76 |
1000 N/mm2
| 607
| 75 - 76 |
Unalloyed heat-treatable steels
| 700 N/mm2
| 607
| 75 - 76 |
850 N/mm2
| 607
| 75 - 76 |
1000 N/mm2
| 607
| 75 - 76 |
Alloyed heat-treatable steels
| 1000 N/mm2
| 607
| 75 - 76 |
1400 N/mm2
| 607
| 75 - 76 |
Unalloyed case hardened steels
| 850 N/mm2
| 607
| 75 - 76 |
Alloyed case hardened steels
| 1000 N/mm2
| 607
| 75 - 76 |
1400 N/mm2
| 607
| 75 - 76 |
Nitriding steels
| 1000 N/mm2
| 607
| 75 - 76 |
1400 N/mm2
| 607
| 75 - 76 |
Tool steels
| 850 N/mm2
| 607
| 75 - 76 |
1400 N/mm2
| 607
| 75 - 76 |
High speed steels
| 1400 N/mm2
| 295
| 75 - 76 |
Spring steels
| 350 HB
| 148
| 73 - 74 |
Stainless steels, sulphured
| 900 N/mm2
| 295
| 74 - 75 |
Stainless steels,austenitic
| 1100 N/mm2
| 197
| 74 - 75 |
Stainless steels,martensitic
| 1200 N/mm2
| 295
| 74 - 75 |
Hardened steels
| 48 HRC
| 164
| 73 - 74 |
65 HRC
| 148
| 73 - 74 |
Cast materials | Cast iron
| 240 HB
| 328
| 75 - 76 |
350 HB
| 328
| 75 - 76 |
Spheroidal graphite iron and malleable cast iron
| 240 HB
| 607
| 75 - 76 |
350 HB
| 295
| 75 - 76 |
Chilled cast iron
| 350 HB
| 131
| 74 - 75 |
Copper, bronze, brass | Brass, short-chipping
| 600 N/mm2
| 574
| 75 - 76 |
Bronze, short-chipping
| 600 N/mm2
| 574
| 75 - 76 |
850 N/mm2
| 574
| 75 - 76 |
Magnesium-alloys | Magnesium alloys
| 450 N/mm2
| 394
| 75 - 76 |
Titanium and Titanium alloys | Ti and Ti-alloys
| 850 N/mm2
| 197
| 74 - 75 |
1400 N/mm2
| 197
| 74 - 75 |
Plastics | Duroplastics
| 150 N/mm2
| 459
| 75 - 76 |
Thermoplastics
| 100 N/mm2
| 459
| 75 - 76 |
Materials for special applications | Special alloys
| 1600 N/mm2
| 164
| 74 - 75
|