B28

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#B28

Description

B28 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: B28

Category	Type	Steel Grade
Steel Grades	Carbon Steel	B28
		B23
		17MnCr5
		B24
		19MnCr5
		B25
		15CrMo4
		B26
		20CrMo4
		B27
		20MnCrMo4-2

Chemical composition(mass fraction)(wt.%) of the B28

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.17-0.23	0.4	0.6-0.95	0.025	0.015	0.35-0.65	0.4-0.7
Mo	Al	Cu	Nb	Ti	V	Ce
0.15-0.25	≤ 0.05	≤0.3		+
N	O2	Pb	B	Other
	≤0.002

Mechanical Properties of steel grade B28

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)
199 (≥)	617 (≥)	24	11	32	Solution and Aging, Annealing, Ausaging, Q+T,etc	434

Physical Properties of steel grade B28

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	-	-			0.34	-
328	913	-	21.3	241		-
441	-	44	21.2			331	333

Heat Treatment of steel grade B28

Heat treated : 1755°C - 1798°C

Technological Curves of steel grade B28

No Curve

Cross Reference Table (Equivalent Grade) of B28

Grade	Standard	Country	Application
X1CrNiMoNb28-4-2	DIN	Germany	Stainless steel
38SMnPb28			Spain structural alloy steel
44SMnPb28			Spain structural alloy steel
EN 38SMnPb28	EN		Euronorm Structural steel
EN 44SMnPb28	EN		Euronorm Structural steel

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B28