Q390NB - GB /T 1591-2018 - H2ABC

中文版

Grade	Q390NB
Corresponding Standard	GB /T 1591-2018 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q390NB Chemical Element Composition Content (%)

Component	C	Si	Mn	P ^②	S ^②	Cr	Ni	Cu	Mo	N	Ti ^③	V	Nb	Al ^④
Minimum Value	-	-	0.9	-	-	-	-	-	-	-	0.006	0.01	0.01	0.015
Maximum Value	0.2	0.5	1.7	0.035	0.035	0.3	0.5	0.4	0.1	0.015	0.05	0.2	0.05	-

Q390NB Mechanical Properties

thickness or diameter t mm	Test Temperature	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤16	Room Temperature	490~650	ReH: ≥390	≥20
16<t≤40		490~650	ReH: ≥380	≥20
40<t≤63		490~650	ReH: ≥360	≥20
63<t≤80		490~650	ReH: ≥340	≥19
80<t≤100		490~650	ReH: ≥340	≥19
100<t≤150		470~620	ReH: ≥320	≥19
150<t≤200		470~620	ReH: ≥310	≥19
200<t≤250		470~620	ReH: ≥300	≥19
specimen	20°C				long. ≥34 tr. ≥27

New and Old Grade Replacement List

Corresponding Standard	Grade
GB /T 1591-1994	Grade
GB /T 1591-2008	Grade China ISC
GB /T 1591-2018	Grade

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!