Q355GJ-B - GB /T 19879-2023

Grade	Q355GJ-B
Corresponding Standard	GB /T 19879-2023 Steel Plate for Building Structure
Classification	Alloy Steel

Q355GJ-B 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	0.2	0.55	1.6	0.025	0.015	0.3	0.3	0.3	0.2	0.035	0.15	0.07	-

Q355GJ-B Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
6≤t≤16	490~610	R_eH：≥355	≥22
16<t≤100	490~610	R_eH：355~475	≥22
100<t≤150	470~600	R_eH：335~455	≥22
150<t≤200	470~600	R_eH：325~445	≥22

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