Q420NC - GB /T 1591-2018 - H2ABC

中文版

Grade	Q420NC
Corresponding Standard	GB /T 1591-2018 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q420NC 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	-	-	1	-	-	-	-	-	-	-	0.006	0.01	0.01	0.015
Maximum Value	0.2	0.6	1.7	0.03	0.03	0.3	0.8	0.4	0.1	0.015	0.05	0.2	0.05	-

Q420NC 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	520~680	ReH: ≥420	≥19
16<t≤40		520~680	ReH: ≥400	≥19
40<t≤63		520~680	ReH: ≥390	≥19
63<t≤80		520~680	ReH: ≥370	≥18
80<t≤100		520~680	ReH: ≥360	≥18
100<t≤150		500~650	ReH: ≥340	≥18
150<t≤200		500~650	ReH: ≥330	≥18
200<t≤250		500~650	ReH: ≥320	≥18
specimen	0°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"!