Recommended Machining Conditions

ISO MaterialConditionTensile Strength [N/mm2]Hardness HBMaterial Group No.(1)
< 0.25 %CAnnealed4201251
Nlltldt>= 0.25 %CAnnealed6501902
on-aoy see an cas steel free cutting steel< 0.55 %CQuenched and tempered8502503
,>= 0.55 %CAnnealed7502204
Quenched and tempered10003005
Annealed6002006
P Low alloy and cast steel (less than9302757
5% of alloying elements)Quenched and tempered10003008
12003509
Hih alloed steel cast steel and tool steelAnnealed68020010
g y ,Quenched and tempered110032511
Stainless steel and cast steelFerritic/martensitic68020012
Martensitic82024013
M Stainless steel and cast steelAustenitic,duplex60018014
Grey cast iron (GG)Ferritic/pearlitic18015
Pearlitic/martensitic26016
K Nodular cast iron (GGG)Ferritic16017
Pearlitic25018
Mllbl t iFerritic13019
aeae cas ronPearlitic23020
Aluminum-wrouht allosNot hardenable6021
g yHardenable10022
Not hardenable7523
Aluminum-cast alloysHardenable9024
N>12% SiHigh temperature13025
>1% PbFree cutting11026
Copper alloysBrass9027
Electrolitic copper10028
Non-metallicDuroplastics,fiberplastics29
Hard rubber30
Fe basedAnnealed20031
Hardened28032
High temp. alloysAnnealed25033
SNi or Co bdHardened35034
aseCast32035
Pure40036
Titanium alloysAlpha+beta alloys hardened105037
Hardened55 HRC38
Hardened steelHardened60 HRC39
H Chilled cast ironCast40040
Cast ironHardened55 HRC41

(1) Based on ISO 513 and VDI 3323 standards