Grade B - ASTMA 588-2005

Grade	Grade B
Corresponding Standard	ASTM A 588-2005 High-Strength Low-Alloy Structural Steel, up to 50 ksi [345 MPa] Minimum Yield Point, with Atmospheric Corrosion Resistance
Classification	Alloy Steel

Grade B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	V
Minimum Value	-	0.15	0.75	-	-	0.4	-	0.2	0.01
Maximum Value	0.2	0.5	1.35	0.04	0.05	0.7	0.5	0.4	0.1

1 Approximate Comparison Table Steel Plate for Boilers and Pressure Vessels

China	Japan	United States	International Organization for Standardization	European Standard		Russia
GB	JIS	ASTM	ISO	EN	Numerical Grade	GOST
Q345R GB/T 713-2008	SEV345 JIS G3124:2004	Grade B ASTM A737/A737M-1999	P355GH ISO 9328-2004	P355GH EN 10028-2-2003	1.0473	17Г1С GOST 5520-1979

2 Approximate Comparison Table Steel Plate for Boilers and Pressure Vessels

GradeB Corresponding Standards(Same grade name, different standards)

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