Machining Data and Parting Speed Recommendations

ISO MaterialConditionTensile Strength [N/mm2]Hardness HBMaterial GroupNo.
< 0.25 %CAnnealed4201251
Non-alloy steel and cast >= 0.25 %CAnnealed6501902
steel, free cutting steel < 0.55 %CQuenched and tempered8502503
>= 0.55 %CAnnealed7502204
Quenched and tempered10003005
Annealed6002006
P Low alloy steel and cast steel9302757
(less than 5% of alloying elements)Quenched and tempered10003008
12003509
High alloyed steel, cast steel,Annealed68020010
and tool steelQuenched and tempered110032511
Stainless steel andFerritic/martensitic68020012
cast steelMartensitic82024013
M Stainless steel and cast steelAustenitic, duplex60018014
GtiGGFerritic/pearlitic18015
rey cas ron ()Pearlitic/martensitic26016
K Cast iron nodular (GGG)Ferritic16017
Pearlitic25018
Malleable cast ironFerritic13019
Pearlitic23020
Not hardenable6021
Aluminum-wrought alloysHardenable10022
Not hardenable7523
Aluminum-cast alloysHardenable9024
N >12% SiHigh temperature13025
>1% PbFree cutting11026
Copper alloysBrass9027
Electrolitic copper10028
Non-metallicDuroplastics, fiberplastics29
Hard rubber30
Annealed20031
Fe basedHardened28032
High temp. alloysAnnealed25033
S Ni or Co basedHardened35034
Cast32035
Titanim allosPureRM 40036
u yAlpha+beta alloys hardenedRM 105037
Hdd tlHardened55 HRC38
H arene seeHardened60 HRC39
Chilled cast iron Cast ironCast Hardened400 55 HRC40 41