Page 88 - HOLE MAKING CATALOG p185-310

DEEP DRILLING - BTA SYSTEM USER GUIDE
ISO
Recommended Machining Conditions

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

Alpha+beta alloys hardened
Hardened
Hardened
Cast
Hardened

272 ISCAR