Machining Recommendations

MaterialChipbreaker
OTensile StrengthGroupHardnessTroubleshooting
IS MaterialCondition[N/mm2]No.(1)HBFirst ChoiceFractureWear
< 0.25 %CAnnealed4201125
Non-alloy steel>= 0.25 %CAnnealed6502190GBGB
and cast steel,< 0.55 %CQuenched and tempered8503250IC908IC806IC9025
free cutting steel>= 0.55 %CAnnealed7504220
Quenched and tempered10005300
Annealed6006200
P Low alloy and cast steel (less9307275GBGB
than 5% of alloying elements)Quenched and tempered10008300IC908IC806IC9025
12009350
High alloyed steel, castAnnealed68010200GBGB
steel and tool steelQuenched and tempered110011325IC908IC806IC9025
Stainless steel and cast steelFerritic/martensitic68012200GBGB
Martensitic82013240IC908IC806IC9025
M Stainless steel and cast steelAustenitic, duplex60014180G IC806B IC908B IC9025
Gre cast iron (GG)Ferritic/pearlitic15180
yPearlitic/martensitic16260
Ferritic17160GGB
K Nodular cast iron(GGG)Pearlitic18250IC908IC806IC9025
Ferritic19130
Malleable cast ironPearlitic20230
Alit llNot hardenable2160
umnum-wrougaoysHardenable22100
Not hardenable2375
Aluminum- cast allosHardenable2490
N y>12% SiHigh temperature25130GGB
>1% PbFree cutting26110IC908IC806IC9025
Copper alloysBrass2790
Electrolitic copper28100
Non-metallicDuroplastics,fiberplastics29
Hard rubber30
Fe basedAnnealed31200
Hardened32280
High temp. alloysNi or CoAnnealed33250BBB
SHardened34350
basedCast35320IC806IC908IC9025
Pure40036
Titanium alloysAlpha+beta alloys hardened105037
Hdd lHardened 55 HRC38
H arene steeHardened 60 HRC39BBB
Chilled cast ironCast40400IC806IC908IC908
Cast ironHardened 55 HRC41

(1) For material groups see pages 495-524