Page 197 - Threading_Handbook

Lead (mm)
Tensile 0.25- 1.25- 1.75- 2.50-
Strength Hardness Material 1.00 1.50 2.00 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 THREAD MILLING
Non-alloy steel Quenched and
and cast steel, < 0.55 %C tempered 850 250 3
free cutting Annealed 750 220 4
steel
>= 0.55 %C Quenched and 1000 300 5
tempered
Annealed 600 200 6
P Low alloy steel and cast steel Quenched and 930 275 7 1 1 2 3
(less than 5% of alloying
elements) tempered 1000 300 8
1200 350 9
Annealed 680 200 10
High alloyed steel, cast Quenched and
steel,and tool steel 1100 325 11
tempered
Ferritic/
Stainless steel and cast steel martensitic 680 200 12
Martensitic 820 240 13
M Stainless steel Austenitic, 600 180 14 1 1 2 3
duplex
Ferritic/pearlitic 180 15
Grey cast iron (GG)
Pearlitic 260 16
Ferritic
K Nodular cast iron (GGG) Pearlitic 160 17 1 1 2 3
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-cast, Hardenable 90 24
alloyed High
>12% Si temperature 130 25 1 1 2 3
N >1% Pb Free cutting 110 26

Copper alloys Brass 90 27
Electrolytic 100 28
copper 1 1 1 1
Duroplastics, 29
Non metallic fiber plastics
Hard rubber 30
Fe based Annealed 200 31
High Hardened 280 32
temperature Ni or Co Annealed 250 33
S alloys based Hardened 350 34 2 2 2 3
Cast 320 35
Pure Rm 400 36
Titanium alloys Alpha+ beta Rm 1050 37
alloys hardened
Hardened 55 HRC 38
Hardened steel
H Chilled cast iron Hardened 60 HRC 39 3 3 3 3
40
400
Cast
Cast iron Hardened 55 HRC 41 2 2 2 3
Rm - ultimate tensile strength, MPa

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