B40

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#B40

Description

B40 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: B40

Category	Type	Steel Grade
Steel Grades	Carbon Steel	B40
		4118H
		4320H
		4620H
		4720H
		4817H
		4820H
		5120H
		8617H
		8620H
		9310H

Chemical composition(mass fraction)(wt.%) of the B40

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.52-0.6	0.4	0.6-0.9	0.025	0.015
Mo	Al	Cu	Nb	Ti	V	Ce
	≤0.05	≤0.3		+
N	O2	Pb	B	Other
	≤0.002

Mechanical Properties of steel grade B40

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)
818 (≥)	546 (≥)	23	11	42	Solution and Aging, Annealing, Ausaging, Q+T,etc	333

Physical Properties of steel grade B40

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
13	-	-			0.33	-
168	911	-	33.3	212		-
991	-	23	22.2			423	311

Heat Treatment of steel grade B40

Heat treated : 1132°C - 1173°C

Technological Curves of steel grade B40

No Curve

Cross Reference Table (Equivalent Grade) of B40

Grade	Standard	Country	Application
51B40			Australia Structural steel

Available Suppliers

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Rfq.: sales@longhaisteel.com

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B40