AISI E4340

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America AISI AISIE4340 Chemical compositions of SAE alloy steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: AISIE4340 / AISI E4340

Category	Grade	Standard	Region/Area	Standard Content
Metals	AISI E4340	SAE J 404	America	Chemical compositions of SAE alloy steels

Chemical composition(mass fraction)(wt.%) of the AISI E4340

Element	Min	Max	Similar
C	0.3800	0.4300	-
Mn	0.6500	0.8500	-
P	-	0.0250	-
S	-	0.0250	-
Si	0.1500	0.3500	-
Ni	1.6500	2.0000	-
Cr	0.7000	0.9000	-
Mo	0.2000	0.3000	-
Si	0.1500	0.3500	-
S	-	0.0250	-
P	-	0.0250	-
Ni	1.6500	2.0000	-
Mo	0.2000	0.3000	-
Mn	0.6500	0.8500	-
Cu	-	0.3500	-
Cr	0.7000	0.9000	-
C	0.3800	0.4300	-
C	0.3800	0.4300	-
Mn	0.6500	0.8500	-
P	-	0.0250	-
S	-	0.0250	-
Si	0.1500	0.3500	-
Ni	1.6500	2.0000	-
Cr	0.7000	0.9000	-
Mo	0.2000	0.3000	-
Cu	-	0.3500	-
Pb	-	-	-
C	0.3800	0.4300	-
Mn	0.6500	0.8500	-
P	-	0.0250	-
S	-	0.0250	-
Si	0.1500	0.3500	-
Ni	1.6500	2.0000	-
Cr	0.7000	0.9000	-
Mo	0.2000	0.3000	-
Cu	-	0.3500	-
C	0.3800	0.4300	-
Mn	0.6500	0.8500	-
P	-	0.0250	-
S	-	0.0250	-
Si	0.1500	0.3500	-
Ni	1.6500	2.0000	-
Cr	0.7000	0.9000	-
Mo	0.2000	0.3000	-
Pb	0.1500	0.3500	-

Mechanical Properties of steel grade AISI E4340

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)
759 (≥)	148 (≥)	31	43	24	Solution and Aging, Annealing, Ausaging, Q+T,etc	343

Physical Properties of steel grade AISI E4340

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
21	-	-			0.23	-
496	597	-	21.3	322		-
315	-	13	33.2			112	322

Heat Treatment of steel grade AISI E4340

Heat treated : 1251°C - 1117°C

Technological Curves of steel grade AISI E4340

No Curve

Cross Reference Table (Equivalent Grade) of AISI E4340

Grade	Standard	Country	Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1

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