Grade B - ASTM A139/A139M-2022

Grade	Grade B
Corresponding Standard	ASTM A139/A139M-2022 Electric-Fusion (Arc)-Welded Steel Pipe (NPS 4 and Over)
Classification	Carbon Steel

Grade B Chemical Element Composition Content (%)

Component	C	Mn	P	S
Minimum Value	-	-	-	-
Maximum Value	0.26	1	0.035	0.035

Grade B Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
≥415	≥240	≥30

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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