EN24 Steel Properties

EN24 / 817m40. EN24 is usually supplied in the T condition with a tensile strength of 850/1000 N/mm^2.

EN24 is a popular grade of through-hardening alloy steel due to its excellent machinability in the "T" condition. EN24T is used in components such as gears, shafts, studs and bolts. EN24T can be further surface-hardened to create components with enhanced wear resistance by induction or nitriding processing.

International Steel Specification Comparison (EN24T)
BS 970:1955	EN24T
BS 970:1991	817M40T
German / DIN	34CrNiMo6
French AFNOR	35NCD6
American AISI / SAE	4340
German Werkstoff No.	1.6582
European Standard	EN10277-5

Typical chemical composition of En24
C	SI	MN	S	P	Cr	Mo	Ni
0.36/0.44	0.10/0.35	0.45/0.70	0.040 max	0.035 max	1.00/1.40	0.20/0.35	1.30/1.70

817M40T / EN24T Mechanical Properties
Size mm	Tensile Strength N/mm²	Yield Stress N/mm²	Elongation	Impact Izod J	Impact KCV J	Hardness HB
63 to 150	850-1000	680 Min	13%	54	50	248/302
150 to 250	850-1000	654 Min	13%	40	35	248/302
Convert hardness to Rockwell B, Rockwell C or Vickers.

EN24 Steel Properties

International Steel Specification Comparison (EN24T)

Typical chemical composition of En24

817M40T / EN24T Mechanical Properties

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