Forged / Hot rolled alloy structural steel AISI 4140 / 1.7225 / SCM440 / 42CrMo4 / 42CrMo / 45CD4 / 708M40

Forged / Hot rolled alloy structural steel AISI 4140 / 1.7225 / SCM440 / 42CrMo4 / 42CrMo / 45CD4 / 708M40

Forged / Hot rolled alloy structural steel AISI 4140 / 1.7225 / SCM440 / 42CrMo4 / 42CrMo / 45CD4 / 708M40

Designation by Standards

Brand Name	Ravne No.	Mat. No.	DIN	EN	AISI
42CRMOS4	792	1.7227	42CrMoS4	42CrMoS4	4140

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo	Ni	V	W	Others
0.41	max. 0.40	0.75	1.05	0.28	-	-	-	-

DescriptionSpecial structural steel.ApplicationsHigh and moderately stressed components for automobile industry and mechanical engineering - shafts, connecting rods, crankshafts, screws, etc.Physical properties (avarage values) at ambient temperatureModulus of elasticity [103 x N/mm2]: 210 Density [g/cm3]: 7.80Soft AnnealingHeat to 680-720oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 241.NormalizingTemperature: 840-880oC.HardeningHarden from a temperature of 820-860oC followed by oil or water quenching.TemperingTempering temperature: 540-680oC.Mechanical Properties in Quenched and Tempered Condition

Diameter (mm)	0.2 proof stress (N/mm2)	Tensile stregth (N/mm2)	Elongation (%)	Reduction (%)	Impact energy (J)
Up to 16	900	1100-1300	10	40	30
17-40	750	1000-1200	11	45	35
41-100	650	900-1100	12	50	35
101-160	550	800-950	13	50	35
161-250	500	750-900	14	55	35

Hardenability in the end-quench testQuenching temperature in the end-quench test is 850oC

Hardness	1.5	3	5	7	9	11	13	15	20	25	30	35	40	45	50
H max.	61	61	61	60	60	59	59	58	56	53	51	48	47	46	45
H min.	53	53	52	51	49	43	40	37	34	32	31	30	30	29	29
HH max.	61	61	61	60	60	59	59	58	56	53	51	48	47	46	45
HH min.	56	56	55	54	52	48	46	44	41	39	38	36	36	35	34
HL max.	58	58	58	57	56	54	53	51	49	46	44	42	41	40	40
HL min.	53	53	52	51	49	43	40	37	34	32	31	30	30	29	29

ForgingHot forming temperature: 1050-850oC.

Production Process and Equipments:

Machining:

Testing:

Shipment:

Quality Certificates: