Q345B - GB 6479-2013

Grade	Q345B
Corresponding Standard	GB 6479-2013 Seamless steel tubes for high-pressure chemical fertilizer equipments
Classification	Alloy Steel

Q345B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^①	Mo	V	Nb	More
Minimum Value	0.12	0.2	1.2	-	-	-	-	-	-	-	-	CEV≤0.45%
Maximum Value	0.2	0.5	1.7	0.025	0.015	0.3	0.5	0.2	0.1	0.15	0.07	CEV≤0.45%

Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	SS	BS EN/BS
Q345B Q345C	SM490A SS490	A572 A678Gr.A SSGrade50	E355C Fe510B	St52-3	E36-2	S355JR Fe510B	1.0045	2132-01	50B

Q345B Corresponding Standards(Same grade name, different standards)

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