
ISCAR
246
USER GUIDE
ISOTURN INSERTS
Machining Data and Speed Recommendations for Turning
ISO 
Material Condition
Tensile Strength 
Rm [N/mm2=MPa] Hardness HB Material Group No.
Cermet  Cermet + PVD 
Carbide  
+ PVD  Carbide + CVD 
IC20N  IC30N  IC520N  IC530N  IC3028/830  IC8250  IC8150  IC5005/428  IC807/907 IC8350
P
Non-alloy steel and cast 
steel, free cutting steel
< 0.25 %C Annealed 420 125 1 250-400  230-380  250-420  230-400  120-200  230-380  280-420  300-450  140-230 125-210
>= 0.25 %C Annealed 650 190 2 220-350  200-330  220-380  200-350  100-170  200-340  240-380  260-400  120-205 110-185
< 0.55 %C Quench and temper 850 250 3 180-320  160-300  180-350  160-320  80-150  170-300  200-340  220-360  100-180 95-165
>= 0.55 %C Annealed 750 220 4 210-340  190-320  210-370  190-340  90-160  190-320  220-360  240-380  115-190 105-175
Quench and temper 1000 300 5 160-300  140-280  160-330  140-300  80-130  160-280  180-320  200-340  95-170 90-155
Low alloy steel and cast steel 
(less than 5% all element)
Annealed 600 200 6 180-320  160-300  180-350  160-320  80-150  170-300  200-340  220-360  100-180 95-165
930 275 7 170-300  150-280  170-330  150-300  70-130  160-280  200-320  220-340  95-170 90-155
Quench and tempered 1000 300 8 160-250  140-230  160-280  140-250  60-120  140-250  190-300  210-320  85-150 75-135
1200 350 9 150-220  130-200  150-250  130-230  50-100  120-220  180-280  200-300  70-130 65-120
High alloyed steel, cast steel and tool steel
Annealed 680 200 10 180-300  160-280  180-330  160-300  80-130  170-280  200-320  220-340  100-170 95-155
Quench and temper 1100 325 11 150-220  130-200  150-250  130-230  50-100  120-220  180-280  200-300  70-30 65-120
Ferritic/martensitic 680 200 12 210-340 190-320 210-370 190-340 90-160 190-320 220-360 240-380
Martensitic 820 240 13 180-320 160-300 180-350 160-320 80-150 170-300 240-380 260-400
ISO
Material Condition
Tensile Strength 
Rm [N/mm2=MPa] Hardness HB Material No.
Cermet + PVD  Carbide + PVD  Carbide + CVD 
IC520N  IC530N  IC807/907  IC808/908  IC3028/830  IC6015 IC6025
MStainless steel Austenitic 600 180 14 150-280  140-250  100-200  90-200  50-120  140-250 120-180
ISO
Material Condition
Tensile Strength 
Rm [N/mm2=MPa] Hardness HB Material No.
Carbide + CVD  Ceramics 
Ceramics  
+ CVD  CBN 
IC5005/ 428  IC5010/ 4028  IC8150 IN11  IN23  IS6 IS8  IS80  IB90/85  IB50 
K
Grey cast iron (GG) Pearlitic/ferritic 180 15 160-300  160-300 140-280 150-400  500-900 80-300  200-400 
Pearlitic/martensitic 260 16 140-280  140-280 120-240 100-350  500-900 50-250  150-350 
Ductile cast iron (nodular) 
(GGG)
Ferritic 160 17 350-700  300-600 250-350 300-800  300-600  500-1200 300-1000  400-1000  500-12000 
Pearlitic 250 18 300-600  250-500 200-300 200-600  200-500  500-1200 250-800  300-800  400-1000 
Malleable cast iron Ferritic 130 19 200-350  250-400 180-320 350-500 
Pearlitic 230 20 180-280  200-320 150-250 150-400 
ISO
Material Condition
Tensile Strength 
Rm [N/mm2=MPa] Hardness HB Material No.
Carbide  PCD 
IC20  ID5 
N
Aluminum-wrought alloys Not cureable 60 21 1000-2500  600-2500 
cured 100 22 300-1000  600-2500 
Aluminum-cast alloys
<=12% Si Not cureable 75 23 300-1000  600-2500 
cured 90 24 200-600  600-2500 
>12% Si High temp. 130 25
Copper alloys
>1% Pb Free cutting 110 26 250-600  600-1000 
Brass 90 27 180-400  600-800 
Electrolitic copper 100 28 150-300  600-800 
Non-metallic Duroplastics, fiber plastics 29
hard rubber 30
ISO
 
Material Condition
Tensile Strength 
Rm [N/mm2=MPa] Hardness HB Material No.
Carbide Carbide + PVD Whiskers CBN
IC07  IC20  IC804 IC806 IC907  IC3028  IW7  IB05S IB10S IB90 IB85 
S
High temp. alloys Fe based Annealed 200 31 40-55  35-45  50-80  30-40 
Cured 280 32 30-45  25-35  40-65  20-30 
Super alloys Ni or Co based
Annealed 250 33 30-40  25-30  65 - 105 50-80 45-60  20-25  150-450
Cured 350 34 20-30  15-25  50 - 90 40-70 35-45  10-20  100-250 100-250 100-200  120-240 
Cast 320 35 25-35  20-30  40 - 85 30-65 30-50  15-25 
Titanium
Ti alloys
Rm 400 36 100-160  80-160  150-200  130-160 
Alpha+beta alloys cured Rm 1050 37 50-60  50-60  50-100  30-60 
ISO
Material Condition
Tensile Strength 
Rm [N/mm2=MPa] Hardness HB Material
Ceramics  CBN 
Carbide  
+ PVD 
IN22 IN420 IN23  IS8  IB10HC IB10H IB50/55  IB20H IB25HC IB25HA IB85/90  IC907 
H
Hardened steel Hardened 55 HRC 38 50-150 60 - 170 40-120  150-350 100-220 100-140  100-220 100-220 90-200 80-140  40-100 
Hardened 60 HRC 39 50-120 60 - 140 40-100  150-350 100-220 80-120  100-220 100-220 90-200 60-120  30-60 
Chilled cast iron Cast 400 40 30-200 30 - 230 70-150 
Cast iron Hardened 55 HRC 41 80-120  60-100  100-140