B4

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Description

B4 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: B4

Category	Type	Steel Grade
Steel Grades	Carbon Steel	B4
		AMS 5596
		AMS 5597
		Inconel X-750
		AMS 5542
		B1
		100Cr6
		B2
		100CrMnSi4-4
		B3
		100CrMnSi6-4

Chemical composition(mass fraction)(wt.%) of the B4

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.93-1.05	0.45-0.75	1.4-1.7	0.025	0.015	1.4-1.65
Mo	Al	Cu	Nb	Ti	V	Ce
≤ 0.1	≤ 0.05	≤0.3		+
N	O2	Pb	B	Other
	≤0.015

Mechanical Properties of steel grade B4

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)
838 (≥)	786 (≥)	41	42	32	Solution and Aging, Annealing, Ausaging, Q+T,etc	222

Physical Properties of steel grade B4

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
42	-	-			0.22	-
714	312	-	33.3	121		-
435	-	44	43.2			142	314

Heat Treatment of steel grade B4

Heat treated : 1797°C - 1923°C

Technological Curves of steel grade B4

No Curve

Cross Reference Table (Equivalent Grade) of B4

Grade	Standard	Country	Application
B45	SS	Sweden	Carbide for cutting tools
B45	SS	Sweden	Carbide for cutting tools
19MnB4			Fasteners with stainless steel and nickel alloy for high temperature and low temperature (NF-EN 10269(1999))
20CrMnVTiB4-10	AFNOR	France	Fasteners with stainless steel and nickel alloy for high temperature and low temperature (NF-EN 10269(1999))
ASTM B4N,B4Q	AISI	USA
51B40			Australia Structural steel
SB410		China	China Taiwan Structural steel
SB450		China	China Taiwan Structural steel
SB450M		China	China Taiwan Structural steel
SB450M		China	China Taiwan Structural steel
SB480		China	China Taiwan Structural steel
SB480M		China	China Taiwan Structural steel
EN 19MnB4	EN		Euronorm Stainless Steel
EN 20CrMoVTiB4-10	EN		Euronorm Stainless Steel
B4N,B4Q	ASTM	USA	Steel Castings, Ferritic and Martensitic, for Pressure-Containing and Other Applications, for Low-Temperature Service
B4N,B4Q	ASTM	USA	Steel Castings, Ferritic and Martensitic, for Pressure-Containing and Other Applications, for Low-Temperature Service
ASTM A437 B4B	ASTM	USA	Standard Specification for Stainless and Alloy-Steel Turbine-Type Bolting Specially Heat Treated for High-Temperature Service1
ASTM A437 B4CB	ASTM	USA	Standard Specification for Stainless and Alloy-Steel Turbine-Type Bolting Specially Heat Treated for High-Temperature Service1
ASTM A437 B4D	ASTM	USA	Standard Specification for Stainless and Alloy-Steel Turbine-Type Bolting Specially Heat Treated for High-Temperature Service1

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B4