Q420GJ-D - GB /T 19879-2023

Grade	Q420GJ-D
Corresponding Standard	GB /T 19879-2023 Steel Plate for building structure
Classification	Alloy Steel

Q420GJ-D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	Al ^①	More
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	0.015	V+Nb+Ti≤0.22%
Maximum Value	0.18	0.55	1.7	0.02	0.01	0.8	1	0.3	0.5	0.03	0.2	0.07	-	V+Nb+Ti≤0.22%

Q420GJ-D Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
6≤t≤16	530~680	R_eH：≥420	≥20
16<t≤100	530~680	R_eH：420~540	≥20
100<t≤150	510~660	R_eH：400~520	≥20

Q420GJ-D Corresponding Standards(Same grade name, different standards)

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