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USER GUIDE
DEEP DRILLING - BTA SYSTEM

Machining Recommendations
Chipbreaker
Troubleshooting

Tensile
Strength Material Hardness First
ISO Material Condition [ksi] Group No. (1) HB Choice Fracture Wear
<0.25% C Annealed 61 1 125
Non-alloy steel ≥0.25% C Annealed 94 2 190 G BG B
and cast steel, <0.55% C Quenched and tempered 123 3 250 IC908 IC806 IC9025
free cutting steel Annealed 109 4 220
≥0.55% C
Quenched and tempered 145 5 300
Annealed 87 6 200
P Low alloy and cast steel 135 7 275 G BG B
(less than 5% of
alloying elements) Quenched and tempered 145 8 300 IC908 IC806 IC9025
174 9 350
High alloyed steel, cast Annealed 99 10 200 G BG B
steel and tool steel Quenched and tempered 160 11 325 IC908 IC806 IC9025
Ferritic/martensitic 99 12 200 G BG B
Stainless steel and cast steel
Martensitic 119 13 240 IC908 IC806 IC9025
G B B
M Stainless steel and cast steel Austenitic, duplex 87 14 180
IC806 IC908 IC9025
Ferritic/pearlitic 15 180
Gray cast iron (GG)
Pearlitic/martensitic 16 260
Ferritic 17 160 G G B
K Nodular cast iron (GGG)
Pearlitic 18 250 IC908 IC806 IC9025
Ferritic 19 130
Malleable cast iron
Pearlitic 20 230
Not hardenable 21 60
Aluminum-wrought alloys
Hardenable 22 100
Not hardenable 23 75
Aluminum- ≤12% Si
cast alloys Hardenable 24 90
N >12% Si High temperature 25 130 G G B
>1% Pb Free cutting 26 110 IC908 IC806 IC9025
Copper alloys Brass 27 90
Electrolytic copper 28 100
Duroplastics, fiber plastics 29
Non metallic
Hard rubber 30
Annealed 31 200
Fe based
High temperature Hardened 32 280
250
Annealed
33
alloys Ni or Co B B B
S Hardened 34 350
based IC806 IC908 IC9025
Cast 35 320
Pure 58 36
Titanium alloys
Alpha+Beta alloys hardened 152 37
Hardened 38
Hardened steel
H Hardened 39 B B B
Chilled cast iron Cast 40 400 IC806 IC908 IC908
Cast iron Hardened 41
(1) For material groups see pages 573-604

276 ISCAR