Q345A - GB /T 1591-1994

Grade	Q345A
Corresponding Standard	GB /T 1591-1994 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q345A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^*	Ni ^*	Cu ^*	Ti	V	Nb
Minimum Value	-	-	1	-	-	-	-	-	0.02	0.02	0.015
Maximum Value	0.2	0.55	1.6	0.045	0.045	0.3	0.3	0.3	0.2	0.15	0.06

Q345A Mechanical Properties

thickness 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≤35	470~630	≥325	≥21
35＜t≤50	470~630	≥295	≥21
50＜t≤100	470~630	≥275	≥21

New and Old Grade Replacement List

Q345A 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"!