Page 86 - HOLE MAKING CATALOG p185-310

DEEP DRILLING - BTA SYSTEM USER GUIDE
ISO
Recommended Machining Conditions

Material Condition Tensile Hardness HB Material
Annealed Strength 125 Group No.(1)
< 0.25 %C Annealed [N/mm2] 190
Quenched and tempered 250 1
Non-alloy steel and cast >= 0.25 %C Annealed 420 220 2
steel, free cutting steel < 0.55 %C Quenched and tempered 650 300 3
>= 0.55 %C Annealed 850 200 4
750 275 5
P Low alloy and cast steel (less than Quenched and tempered 1000 300 6
5% of alloying elements) 600 350 7
Annealed 930 200 8
High alloyed steel, cast steel and tool steel Quenched and tempered 1000 325 9
1200 200 10
Stainless steel and cast steel Ferritic/martensitic 680 240 11
M Stainless steel and cast steel Martensitic 1100 180 12
680 180 13
Grey cast iron (GG) Austenitic, duplex 820 260 14
Ferritic/pearlitic 600 160 15
K Nodular cast iron (GGG) 250 16
Pearlitic/martensitic 400 130 17
Malleable cast iron Ferritic 1050 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
Non-metallic Fe based Hardenable 27
Ni or Co based 200 28
High temp. alloys High temperature 280 29
S Free cutting 250 30
Brass 350 31
Titanium alloys 320 32
Electrolitic copper 33
Hardened steel Duroplastics, fiber plastics 55 HRC 34
H Chilled cast iron 60 HRC 35
Hard rubber 36
Cast iron Annealed 400 37
Hardened 55 HRC 38
(1) Based on ISO 513 and VDI 3323 standards Annealed 39
Hardened 40
Cast 41
Pure

Alpha+beta alloys hardened
Hardened
Hardened
Cast
Hardened

270 ISCAR