Q345C - GB /T 1591-1994

Grade	Q345C
Corresponding Standard	GB /T 1591-1994 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q345C 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	0.2	0.55	1.6	0.035	0.035	0.3	0.3	0.3	0.2	0.15	0.06	-

Q345C 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	0°C				≥34

New and Old Grade Replacement List

1 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

2 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden
GB	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS
Q345C	FeE690	St60-2	A60-2	E335 Fe590-2①	1.0060	St5ps St5sp St6ps St6sp	1650-00 1650-01

Q345C 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"!