Page 84 - HOLE MAKING CATALOG p185-310

DEEP DRILLING - BTA SYSTEM USER GUIDE
ISO
Recommended Machining Conditions

Material < 0.25 %C Condition Tensile Strength Hardness HB Material
>= 0.25 %C Annealed [N/mm2] 125 Group No.(1)
Non-alloy steel and cast < 0.55 %C Annealed 420 190
steel, free cutting steel >= 0.55 %C Quenched and tempered 650 250 1
Annealed 850 220 2
P Low alloy and cast steel (less than Quenched and tempered 750 300 3
5% of alloying elements) Annealed 1000 200 4
600 275 5
High alloyed steel, cast steel and tool steel Quenched and tempered 930 300 6
1000 350 7
Stainless steel and cast steel Annealed 1200 200 8
M Stainless steel and cast steel Quenched and tempered 680 325 9
1100 200 10
Grey cast iron (GG) Ferritic/martensitic 680 240 11
Martensitic 820 180 12
K Nodular cast iron (GGG) 600 180 13
Austenitic, duplex 260 14
Malleable cast iron Ferritic/pearlitic 400 160 15
1050 250 16
Aluminum-wrought alloys <=12% Si Pearlitic/martensitic 130 17
Ferritic 230 18
Aluminum-cast alloys >12% Si Pearlitic 60 19
N >1% Pb Ferritic 100 20
Pearlitic 75 21
Copper alloys 90 22
Not hardenable 130 23
Non-metallic Hardenable 110 24
90 25
High temp. alloys Fe based Not hardenable 100 26
S Hardenable 27
Ni or Co 200 28
based High temperature 280 29
Free cutting 250 30
Titanium alloys Brass 350 31
320 32
Hardened steel Electrolitic copper 33
H Chilled cast iron Duroplastics, fiber plastics 55 HRC 34
60 HRC 35
Cast iron Hard rubber 36
Annealed 400 37
(1) Based on ISO 513 and VDI 3323 standards Hardened 55 HRC 38
Annealed 39
Hardened 40
Cast
Pure 41

Alpha+beta alloys hardened
Hardened
Hardened
Cast
Hardened

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