Q345B L03452 - GB /T 1591-2008

Grade	Q345B
China ISC	L03452
Corresponding Standard	GB /T 1591-2008 High Strength Low Alloy Structural Steels
Brand/Supplier	-> BENSTEEL
Classification	Alloy Steel
Properties	Low-Temperature Toughness Forgability Machinability Weldability

Q345B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	Ti	V	Nb
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	-
Maximum Value	0.2	0.5	1.7	0.035	0.035	0.3	0.5	0.3	0.1	0.012	0.2	0.15	0.07

Q345B Mechanical Properties

thickness(diameter、length of side) t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤16	470~630	≥345	≥20
16< t≤ 40	470~630	≥335	≥20
40＜t≤63	470~630	≥325	≥19
63＜t≤80	470~630	≥315	≥19
80＜t≤100	470~630	≥305	≥19
100＜t≤150	450~600	≥285	≥18
150＜t≤200	450~600	≥275	≥17
200＜t≤250	450~600	≥265	≥17

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)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!