Material 1.7264

Case hardening steel

1.7264 is an alloyed carbon steel with a density of 7.8
This material is used for components subject to higher loads.

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1.7264

Standards

HDIN / EN US-Standard AFNOR UNI JIS request
20CrMo5 request

Material Category: Case hardening steel

Applications

gears
waves
crankshafts
connecting rod
camshafts

Heat Treatment

Annealing at 680 - 700 C°
Carburizing at 840 - 880 C°
Core hardening at 820 - 850 C°
Surface layer hardening at 810 - 830 C°
Temper at 150 - 180 C°

Weldability

20CrMo5 is usually weldable.

Chemical Composition

C % Si % Mn % P % S % Cr % Mo %
0,18 - 0,23 0,15 - 0,35 0,90 - 1,20 max 0,035 max 0,035 1,10 - 1,40 0,20 - 0,30

 

Mechanical Properties

Stabstahl
behandelt auf Härtespanne Härte [HB 30]
<= 150 mm 179 - 217 HB 30
weichgeglüht Härte [HB 30]
  <= 217 HB 30
nach Einsatzhärtung, im Kern Streckgrenze (Re) Zugfestigkeit (Rm) Bruchdehnung (A5, 65) Einschnürung (Z) Kerbschlagarbeit KV
(ISO-V/Charpy-V)
 <= 11 mm >= 735 N/mm² 1.080 - 1.370 N/mm² >= 7 % >= 30 % >= 27 Joule
<= 30 mm >= 685 N/mm² 980 - 1.270 N/mm² >= 8 % >= 35 % >= 27 Joule
<= 63 mm >= 540 N/mm² 780 - 1.080 N/mm² >= 10 % >= 35 %  

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