B440QZR - Q/BQB 310-2023

Grade	B440QZR
Corresponding Standard	Q/BQB 310-2023 Continuously hot-rolled steel sheet and strip for automobile structural use
Classification	Alloy Steel

B440QZR Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^*	Ni ^*	Cu ^*
Minimum Value	-	-	-	-	-	-	-	-
Maximum Value	0.12	0.5	1.3	0.025	0.02	0.15	0.15	0.2

B440QZR Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
Steel Plate and Steel Strip	440~570	ReL: ≥320	L0=5.65√S0 ≥15

B440QZR 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"!