ISO | Workpiece Material Group | Material Designation | Material Condition | Hardness | Cutting Speed Recommendations (Vc) |
N | 21 | Aluminum-wrought alloy. | Not cureable | 60 HB | 800-900 m/min |
N | 22 | Aluminum-wrought alloy. | Cured | 100 HB | 700-800 m/min |
N | 23 | Aluminum-cast, alloyed <12% Si. | Not cureable | 75 HB | 800-900 m/min |
N | 24 | Aluminum-cast, alloyed. | Cured | 90 HB | 750-850 m/min |
N | 25 | Aluminum-cast, alloyed >12% Si. | High temperature | 130 HB | 400-450 m/min |
N | 26 | Copper alloys >1% pb. | Free cutting | 110 HB | 500-550 m/min |
N | 27 | Copper alloys. | Brass | 90 HB | 500-550 m/min |
N | 28 | Copper alloys. | Electrolitic copper | 100 HB | 350-380 m/min |