Page 287 - THREADING CATALOG

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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. (1) Number of passes THREAD MILLING
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 930 275 7
(less 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 and cast steel austenitic, duplex 600 180 14 1 1 2 3
ferritic / pearlitic 180 15
gray 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 alloys
hardenable 100 22
not hardenable 75 23 1 1 1 1
≤12% Si
aluminum- hardenable 90 24
cast alloys
>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 70 Shore D 29
hard rubber 55 Shore D 30
annealed 200 31
Fe based
high hardened 280 32
temperature annealed 250 33
alloys Ni or Co based hardened 350 34
S 2 2 2 3
cast 320 35
pure 400 190 36
titanium alloys alpha+beta alloys,
hardened 1050 310 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
(1) For workpiece materials list, see pages 443-472

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