Page 122 - MILLING CATALOG p319-550

THREAD MILLING TOOLS USER GUIDE
ISO
Number of Radial Passes

Material Condition Tensile Hardness Material 0.25-1.00 Lead (mm) 2.50-6.00
< 0.25 %C Annealed Strength HB No. 1.25-1.50 1.75-2.00
>= 0.25 %C Annealed [N/mm2] 125 1 1 3
Quenched and 190 2 Number of passes
Non-alloy steel < 0.55 %C tempered 420 1 3
and cast steel, Annealed 650 250 3 1 12 3
free cutting steel 1 1
Quenched and 850 220 4 1 12 3
>= 0.55 %C tempered 1 12 1
750 300 5 11
P Low alloy and cast steel (less Annealed 2 12 3
than 5% of alloying elements) 1000 200 6 3 11 3
Quenched and 275 7 2 3
High alloyed steel, cast tempered 600 300 8 22
steel and tool steel 930 350 9
Annealed 1000 200 10 33
1200 22
Quenched and 680 325 11
tempered
1100 200 12
240 13
Stainless steel and cast steel Ferritic/martensitic 680 180 14
M Stainless steel Martensitic 820 180 15
260 16
Grey cast iron (GG) Austenitic, duplex 600 160 17
250 18
K Nodular cast iron (GGG) Ferritic/pearlitic 130 19
Pearlitic /martensitic 230 20
Malleable cast iron 60 21
Ferritic 100 22
Aluminum- wrought alloy Pearlitic 75 23
Ferritic 90 24
Aluminum- <=12% Si Pearlitic
cast, alloyed Not hardenable 130 25
>12% Si Hardenable
N >1% Pb Not hardenable 110 26
Copper alloys Hardenable 90 27
100 28
High temperature
200 29
Free cutting 280
Brass 250 30
350 31
Electrolytic copper 320 32
33
Non metallic Duroplastics, 55 HRC 34
fiber plastics 60 HRC 35
36
High temperature Fe based Hard rubber 400
alloys 55 HRC 37
S Ni or Co Annealed
based 38
Titanium alloys Hardened 39
400 40
Hardened steel Annealed 1050 41
H Chilled cast iron
Hardened
Cast iron
Cast

Pure
Alpha+ beta
alloys, hardened
Hardened

Hardened

Cast

Hardened

Rm - ultimate tensile strength, MPa

438 ISCAR