Q620GJ-E - GB /T 19879-2023

Grade	Q620GJ-E
Corresponding Standard	GB /T 19879-2023 Steel Plate for building structure
Classification	Alloy Steel

Q620GJ-E Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	Al ^①
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	0.015
Maximum Value	0.18	0.6	2	0.02	0.01	1.2	2	0.5	0.6	0.03	0.12	0.11	-

Q620GJ-E Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
12≤t≤20	730~900	R_eH：≥620	≥17
20<t≤50	730~900	R_eH：620~770	≥17

Q620GJ-E Corresponding Standards(Same grade name, different standards)

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