QStE420TM - Q/BQB 310-2023

Grade	QStE420TM
Corresponding Standard	Q/BQB 310-2023 Continuously hot-rolled steel sheet and strip for automobile structural use
Classification	Alloy Steel

QStE420TM Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^*	Ni ^*	Cu ^*	Ti ^ⓐ	V ^ⓐ	Nb ^ⓐ	Al ^ⓐ	More
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	0.015	Nb+V+Ti≤0.22ⓐ
Maximum Value	0.12	0.5	1.5	0.025	0.02	0.15	0.15	0.2	0.15	0.2	0.09	-	Nb+V+Ti≤0.22ⓐ

QStE420TM Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t＜3	480~620	ReH: ≥420	L0=80mm,b=20mm ≥16
t≥3	480~620	ReH: ≥420	L0=5.65√S0 ≥21

QStE420TM Corresponding Standards(Same grade name, different standards)

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