Page 274 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE
DEEP DRILLING - BTA SYSTEM

Recommended Machining Conditions

Tensile Strength Material
ISO Material Condition [N/mm ] Hardness HB Group No. (1)
2
<0.25% C Annealed 420 125 1
>=0.25% C Annealed 650 190 2
Non-alloy steel and cast <0.55% C Quenched and tempered 850 250 3
steel, free cutting steel
>=0.55% C Annealed 750 220 4
Quenched and tempered 1000 300 5
Annealed 600 200 6
P Low alloy and cast steel (less than 930 275 7
5% of alloying elements) Quenched and tempered 1000 300 8
1200 350 9
Annealed 680 200 10
High alloyed steel, cast steel and tool steel
Quenched and tempered 1100 325 11
Ferritic/martensitic 680 200 12
Stainless steel and cast steel
Martensitic 820 240 13
M Stainless steel and cast steel Austenitic, duplex 600 180 14
Ferritic/pearlitic 180 15
Grey cast iron (GG)
Pearlitic/martensitic 260 16
Ferritic 160 17
K Nodular cast iron (GGG)
Pearlitic 250 18
Ferritic 130 19
Malleable cast iron
Pearlitic 230 20
Not hardenable 60 21
Aluminum-wrought alloys
Hardenable 100 22
<=12% Si Not hardenable 75 23
Aluminum-cast alloys Hardenable 90 24
>12% Si High temperature 130 25
N
>1% Pb Free cutting 110 26
Copper alloys Brass 90 27
Electrolitic copper 100 28
Duroplastics, fiber plastics 29
Non-metallic
Hard rubber 30
Annealed 200 31
Fe based
Hardened 280 32
High temp. alloys Annealed 250 33
S Ni or Co based Hardened 350 34
Cast 320 35
Pure 400 36
Titanium alloys
Alpha+beta alloys hardened 1050 37
Hardened 55 HRC 38
Hardened steel
H Hardened 60 HRC 39
Chilled cast iron Cast 400 40
Cast iron Hardened 55 HRC 41
(1) Based on ISO 513 and VDI 3323 standards

272 ISCAR