AISI 4140

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#AISI # #4140

Description

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

Datasheet for: Steel Grades:Carbon Steel: AISI 4140

Category	Type	Steel Grade
Steel Grades	Carbon Steel	AISI 4140
		AISI A4125
		SAE 4125
		AISI 4130
		SAE 4130
		UNS G41300
		AISI 4137
		SAE 4137
		UNS G41370
		AISI TS4137
		AISI E4137

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

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.38-0.43	0.15-0.35	0.75-1	0.035	0.04	0.8-1.1
Mo	Al	Cu	Nb	Ti	V	Ce
0.15-0.25
N	Co	Pb	B	Other

Mechanical Properties of steel grade AISI 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)
478 (≥)	258 (≥)	21	14	22	Solution and Aging, Annealing, Ausaging, Q+T,etc	213

Physical Properties of steel grade AISI 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
12	-	-			0.34	-
778	868	-	44.3	122		-
933	-	34	23.2			344	121

Heat Treatment of steel grade AISI 4140

Heat treated : 1941°C - 1566°C

Technological Curves of steel grade AISI 4140

No Curve

Cross Reference Table (Equivalent Grade) of AISI 4140

Grade	Standard	Country	Application
AISI 431	AISI	USA	Martensitic special steel
AISI 440A	AISI	China	Martensitic special steel
AISI 440B	AISI	USA	Martensitic special steel
AISI 440F	AISI	USA	Martensitic special steel
AISI 440F Se	AISI	USA	Martensitic special steel
AISI 501	AISI	USA	Martensitic special steel
AISI 501A	AISI	USA	Martensitic special steel
AISI 501B	AISI	USA	Martensitic special steel
AISI 502	AISI	USA	Martensitic special steel
AISI 503	AISI	USA	Martensitic special steel
AISI 504	AISI	USA	Martensitic special steel
AISI S13800		USA	precipitation hardening
AISI S15500	AISI	USA	precipitation hardening
AISI 632	AISI	USA	precipitation hardening
AISI 630	AISI	USA	precipitation hardening
AISI 635	AISI	USA	precipitation hardening
AISI 631	AISI	USA	precipitation hardening
AISI 633	AISI	USA	precipitation hardening
AISI 633	AISI	USA	precipitation hardening
AISI 634	AISI	USA	precipitation hardening

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