Q345D L03454 - GB /T 1591-2008

Grade	Q345D
China ISC	L03454
Corresponding Standard	GB /T 1591-2008 High Strength Low Alloy Structural Steels
Brand/Supplier	China -> BENSTEEL
Classification	Alloy Steel
Properties	Low-Temperature Resistance Good Forgability Good Weldability

Q345D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	Ti	V	Nb	Al ^b
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	-	0.015
Maximum Value	0.18	0.5	1.7	0.03	0.025	0.3	0.5	0.3	0.1	0.012	0.2	0.15	0.07	-

Q345D 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	≥21
16<t≤40	470~630	≥335	≥21
40＜t≤63	470~630	≥325	≥20
63＜t≤80	470~630	≥315	≥20
80＜t≤100	470~630	≥305	≥20
100＜t≤150	450~600	≥285	≥19
150＜t≤200	450~600	≥275	≥18
200＜t≤250	450~600	≥265	≥18
250＜t≤400	450~600	≥265	≥17

New and Old Grade Replacement List

1 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	International Organization for Standardization	Germany	European Standard		United Kingdom
GB	ISO	DIN EN/DIN	EN	Numerical Grade	BS EN/BS
Q345D	S355D	St52-3N	S355J2C	1.0579	50D8

2 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

3 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

Q345D Corresponding Standards(Same grade name, different standards)

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