Q390B L03902 - GB /T 1591-2008

Grade	Q390B
China ISC	L03902
Corresponding Standard	GB /T 1591-2008 High Strength Low Alloy Structural Steels
Classification	Alloy Steel
Properties	High Strength Fatigue Resistance Good Weldability

Q390B 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	0.5	0.3	0.1	0.015	0.2	0.2	0.07

Q390B 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	490~650	≥390	≥20
16<t≤40	490~650	≥370	≥20
40＜t≤63	490~650	≥350	≥19
63＜t≤80	490~650	≥330	≥19
80＜t≤100	490~650	≥330	≥19
100＜t≤150	470~620	≥310	≥18

New and Old Grade Replacement List

Q390B 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"!