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MATERIAL GROUPS

According to DIN / ISO 513 and VDI 3323
Tensile Hardness Material
Strength Kc1
(1)
ISO Material Condition [N/mm ] [N/mm ] m c (2) HB No.
2
2
< 0.25 %C Annealed 420 1350 0.21 125 1
Non-alloy steel >= 0.25 %C Annealed 650 1500 0.22 190 2
and cast steel, < 0.55 %C Quenched and tempered 850 1675 0.24 250 3
free cutting steel >= 0.55 %C Annealed 750 1700 0.24 220 4
Quenched and tempered 1000 1900 0.24 300 5
Low alloy steel Annealed 600 1775 0.24 200 6
P and cast steel 930 1675 0.24 275 7
(less than 5% of Quenched and tempered 1000 1725 0.24 300 8
alloying elements
1200 1800 0.24 350 9
High alloy steel, Annealed 680 2450 0.23 200 10
cast steel, and tool steel Quenched and tempered 1100 2500 0.23 325 11
Ferritic/martensitic 680 1875 0.21 200 12
Stainless steel
Martensitic 820 1875 0.21 240 13
M Stainless steel Austenitic 600 2150 0.20 180 14

Pearlitic/ferritic 1150 0.20 180 15
Grey cast iron
Pearlitic/martensitic 1350 0.28 260 16
K Ductile cast iron (nodular) Ferritic 1225 0.25 160 17
Pearlitic 1350 0.28 250 18
Ferritic 1225 0.25 130 19
Malleable cast iron
Pearlitic 1420 0.3 230 20
Aluminum- Not cureable 700 0.25 60 21
wrought alloy Cured 800 0.25 100 22
<=12% Si Not cureable 700 0.25 75 23
Aluminum-cast,
alloyed Cured 700 0.25 90 24
N >12% Si High temperature 750 0.25 130 25
0.27
700
26
110
>1% Pb Free cutting
Copper alloys
Brass 700 0.27 90 27
Electrolitic copper 700 0.27 100 28
Duroplastics, fiber plastics 29
Non-metallic
Hard rubber 30
Annealed 2600 0.24 200 31
Fe based
Cured 3100 0.24 280 32
D High temp. alloys Ni or Co Annealed 3300 0.24 250 33
S based Cured 3300 0.24 350 34
Cast 3300 0.24 320 35
Titanium and RM 400 1700 0.23 36
Ti alloys Alpha+beta alloys cured RM 1050 2110 0.22 37
Hardened 4600 55 HRc 38
Hardened steel
H Hardened 4700 60 HRc 39
Chilled cast iron Cast 4600 400 40
Cast iron Hardened 4500 55 HRc 41
Steel Stainless Steel Cast Iron
Nonferrous High Temp. Alloys Hardened Steel

(1) Specific cutting force for 1 mm chip section.
2
(2) Chip thickness factor.

86 ISCAR