B30

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#B30

Description

B30 Carbon Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Carbon Steel: B30

Category	Type	Steel Grade
Steel Grades	Carbon Steel	B30
		15CrMo4
		B26
		20CrMo4
		B27
		20MnCrMo4-2
		B28
		20NiCrMo2
		B29
		20NiCrMo7
		20NiCrMo7

Chemical composition(mass fraction)(wt.%) of the B30

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.15-0.21	0.4	0.65-0.9	0.02	0.01	1.5-1.8	1.4-1.7
Mo	Al	Cu	Nb	Ti	V	Ce
0.25-0.35	≤ 0.05	≤0.3		+
N	O2	Pb	B	Other
	≤0.002

Mechanical Properties of steel grade B30

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)
188 (≥)	177 (≥)	42	22	43	Solution and Aging, Annealing, Ausaging, Q+T,etc	332

Physical Properties of steel grade B30

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	-	-			0.12	-
139	251	-	32.3	443		-
289	-	34	12.2			131	111

Heat Treatment of steel grade B30

Heat treated : 1288°C - 1838°C

Technological Curves of steel grade B30

No Curve

Cross Reference Table (Equivalent Grade) of B30

Grade	Standard	Application
11SMnPb30		Spain structural alloy steel
86B30H		Australia Structural steel
EN 11SMnPb30	EN	Euronorm Structural steel

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B30