Specific Cutting Force Kc

ISOSpeed vc (feet/min) MaterialsRmKc:N/mm2
Unalloyed400-600 N/mm2 120-180 HBN2050
Steel600-950 N/mm2 180-200 HBN2300
P700-950 N/mm2 200-280 HBN2599
Alloyed Steel950-1200 N/mm2 280-355 HBN2851
1200-1400 N/mm2 355-415 HBN3172
Tool Steel1200-1400 N/mm2 355-415 HBN3895
StainlessAustenitic + Ferritic 300 series1847
MSteelMartensitic 400 series2599
PH StainlessRefractory P.H.3199
Grey GG-Ft1200
KCt ISpheroidal-Ductile GGG-FGS1500
as ronNodular GGGNi - L- N1600
Malleable GTS - MN/MP1050
NAluminiumAluminium & Alloys < 16% 116 HBN827
& AlloysAluminium + Silicon > 16% 92 HBN965
Iron Based2999
HighCobalt Based3799
STemperature AlloysNickel Based3500
Titanium Based 425-456 HBN1500