Q345E - GB /T 1591-1994

Grade	Q345E
Corresponding Standard	GB /T 1591-1994 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q345E Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^*	Ni ^*	Cu ^*	Ti	V	Nb	Al
Minimum Value	-	-	1	-	-	-	-	-	0.02	0.02	0.015	0.015
Maximum Value	0.18	0.55	1.6	0.025	0.025	0.3	0.3	0.3	0.2	0.15	0.06	-

Q345E Mechanical Properties

thickness t mm	Test Temperature	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤16	Room Temperature	470~630	≥345	≥22
16＜t≤35		470~630	≥325	≥22
35＜t≤50		470~630	≥295	≥22
50＜t≤100		470~630	≥275	≥22
specimen	-40°C				≥27

New and Old Grade Replacement List

Approximate Comparison Table Carbon Structural Steel and Engineering Steel

Q345E Corresponding Standards(Same grade name, different standards)

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