Page 39 - HOLE MAKING CATALOG p185-310

USER GUIDE
ISO
Machining Recommendations
DEEP DRILLING - BTA SYSTEM
Material Chipbreaker

Tensile Strength Group Hardness Troubleshooting

Material Condition [N/mm2] No.(1) HB First Choice Fracture Wear
< 0.25 %C Annealed
Annealed 420 1 125
Non-alloy steel >= 0.25 %C Quenched and tempered
and cast steel, < 0.55 %C Annealed 650 2 190 G BG B
free cutting steel >= 0.55 %C Quenched and tempered 250 IC908 IC806 IC9025
Annealed 850 3 220
P Low alloy and cast steel (less
than 5% of alloying elements) Quenched and tempered 750 4

1000 5 300

600 6 200

930 7 275 G BG B

1000 8 300 IC908 IC806 IC9025

1200 9 350

High alloyed steel, cast Annealed 680 10 200 G BG B
steel and tool steel Quenched and tempered
1100 11 325 IC908 IC806 IC9025
Stainless steel and cast steel Ferritic/martensitic
Martensitic 680 12 200 G BG B

820 13 240 IC908 IC806 IC9025

M Stainless steel and cast steel Austenitic, duplex 600 14 180 G B B
IC806 IC908 IC9025

Grey cast iron (GG) Ferritic/pearlitic 15 180
Pearlitic/martensitic 16
17 260
Ferritic 18
K Nodular cast iron (GGG) Pearlitic 19 160 G GB
Ferritic 20
Pearlitic 21 250 IC908 IC806 IC9025
Not hardenable 22
Malleable cast iron Hardenable 23 130
Not hardenable 24
Hardenable 25 230
High temperature 26
Aluminum-wrought alloys Free cutting 27 60
Brass 28
Electrolitic copper 29 100
Duroplastics, fiber plastics 30
Aluminum- <=12% Si Hard rubber 31 75
cast alloys Annealed 32
N >12% Si Hardened 33 90
>1% Pb Annealed 34
Copper alloys Hardened 35 130 G GB
36
Cast 37 110 IC908 IC806 IC9025
Pure 38
Alpha+beta alloys hardened 39 90
Hardened 55 HRC 40
Hardened 60 HRC 41 100
Cast
Non-metallic Hardened 55 HRC

Fe based 200

280

High temp. alloys Ni or Co 250 B B B
based 350 IC806 IC908 IC9025
S 320

Titanium alloys 400
1050

Hardened steel B BB
H Chilled cast iron
400 IC806 IC908 IC908
Cast iron

(1) For material groups see pages 495-524

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