Page 440 - ISCAR(MILLINGCATALOG 38_2021)

USER GUIDE
THREAD MILLING TOOLS

Number of Radial Passes

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

438 ISCAR