ASTM 4340H

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#ASTM # # #4340H

Description

ASTM 4340H Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: ASTM 4340H

Category	Type	Steel Grade
Steel Grades	Carbon Steel	ASTM 4340H
		ASTM 4145H
		UNS H41450
		ASTM 4147H
		UNS H41470
		ASTM 4150H
		UNS H41500
		ASTM 4161H
		UNS H41610
		ASTM 4320H
		UNS H43200

Chemical composition(mass fraction)(wt.%) of the ASTM 4340H

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.37-0.44	0.15-0.35	0.55-0.9			0.65-0.95	1.55-2.0
Mo	Al	Cu	Nb	Ti	V	Ce
0.2-0.3
N	Co	Pb	B	Other

Mechanical Properties of steel grade ASTM 4340H

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)
958 (≥)	744 (≥)	42	13	23	Solution and Aging, Annealing, Ausaging, Q+T,etc	341

Physical Properties of steel grade ASTM 4340H

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	-	-			0.31	-
291	755	-	32.3	221		-
566	-	21	34.2			234	123

Heat Treatment of steel grade ASTM 4340H

Heat treated : 1941°C - 1132°C

Technological Curves of steel grade ASTM 4340H

No Curve

Cross Reference Table (Equivalent Grade) of ASTM 4340H

Grade	Standard	Country	Application
ASTM 1030	ASTM	USA	General use carbon steel bar
ASTM 1005	ASTM	USA	General use carbon steel bar
ASTM 1006	ASTM	USA	General use carbon steel bar
ASTM 1008	ASTM	USA	General use carbon steel bar
ASTM 1010	ASTM	USA	General use carbon steel bar
ASTM 1013	ASTM	USA	General use carbon steel bar
ASTM 1015	ASTM	USA	General use carbon steel bar
ASTM 1016	ASTM	USA	General use carbon steel bar
ASTM 1017	ASTM	USA	General use carbon steel bar
ASTM 1018	ASTM	USA	General use carbon steel bar
ASTM 1019	ASTM	USA	General use carbon steel bar
ASTM 1020	ASTM	USA	General use carbon steel bar
ASTM 1021	ASTM	USA	General use carbon steel bar
ASTM W1-A	ASTM	USA	Carbon tool steel
ASTM A182 F55	ASTM	USA	Super Duplex
ASTM 431	ASTM	USA	Martensitic special steel
ASTM 440A	ASTM	USA	Martensitic special steel
ASTM 440B	ASTM	USA	Martensitic special steel
ASTM 440C	ASTM	USA	Martensitic special steel
ASTM 501	ASTM	USA	Martensitic special steel

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