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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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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