4140

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#4140

Description

4140 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: 4140

Category	Type	Steel Grade
Steel Grades	Carbon Steel	4140
		B42
		70Mn4
		B43
		43CrMo4
		1030
		1040
		1050
		1541
		1552
		4130

Chemical composition(mass fraction)(wt.%) of the 4140

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.38-0.43	0.15-0.35	0.75-1.0	0.025	0.015	0.8-1.1
Mo	Al	Cu	Nb	Ti	V	Ce
0.15-0.25	0.05	0.3		+
N	O2	Pb	B	Other
	0.002

Mechanical Properties of steel grade 4140

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
871 (≥)	646 (≥)	32	34	13	Solution and Aging, Annealing, Ausaging, Q+T,etc	333

Physical Properties of steel grade 4140

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
23	-	-			0.43	-
526	213	-	32.3	323		-
461	-	11	43.2			314	231

Heat Treatment of steel grade 4140

Heat treated : 1512°C - 1973°C

Technological Curves of steel grade 4140

No Curve

Cross Reference Table (Equivalent Grade) of 4140

Grade	Standard	Country	Application
SAE NV7(4140)	SAE	USA	precipitation hardening
UNS H41400	UNS	USA	precipitation hardening
ICI 4140	AISI	USA
414140			The Czech republic Structural steel
14140			The Czech republic Structural steel
4140			Australia Structural steel
4140H			Australia Structural steel
4140			Australia Structural steel
4140		USA	Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
4140		USA	Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures

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Rfq.: sales@longhaisteel.com

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