Q420B L04202 - GB /T 3274-2017

Grade	Q420B
China ISC	L04202
Corresponding Standard	GB /T 3274-2017 Hot-rolled plates, sheets and strips of carbon structural steels and high strength low alloy structural sheets
Brand/Supplier	-> BAOSTEEL
Classification	Alloy Steel
Properties	Strength Fatigue Resistance Weldability

Q420B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	Ti	V	Nb
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	-
Maximum Value	0.2	0.5	1.7	0.035	0.035	0.3	0.8	0.3	0.2	0.015	0.2	0.2	0.07

Q420B Mechanical Properties

thickness（diameter，length of side） t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
t≤16	520~680	≥420	≥19
16<t≤40	520~680	≥400	≥19
40＜t≤63	520~680	≥380	≥18
63＜t≤80	520~680	≥360	≥18
80＜t≤100	520~680	≥360	≥18
100＜t≤150	500~650	≥340	≥18

Q420B Corresponding Standards(Same grade name, different standards)

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