Q420ME - GB /T 1591-2018

Grade	Q420ME
Corresponding Standard	GB /T 1591-2018 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q420ME Chemical Element Composition Content (%)

Component	C ^⑤	Si	Mn	P ^②	S ^②	Cr	Ni	Cu	Mo	N	Ti ^③	V	Nb	Al ^④
Minimum Value	-	-	-	-	-	-	-	-	-	-	0.006	0.01	0.01	0.015
Maximum Value	0.16	0.5	1.7	0.025	0.02	0.3	0.8	0.4	0.2	0.025	0.05	0.12	0.05	-

Q420ME 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		500~660	ReH: ≥390	≥19
63＜t≤80		480~640	ReH: ≥380	≥19
80＜t≤100		470~630	ReH: ≥370	≥19
100＜t≤120ⓐ		460~620	ReH: ≥365	≥19
specimen	20°C				long. ≥63 tr. ≥40
specimen	0°C				long. ≥55 tr. ≥34
specimen	-20°C				long. ≥47 tr. ≥27
specimen	-40°C				long. ≥31 tr. ≥20
specimen	-50°C				long. ≥27* tr. ≥16*

New and Old Grade Replacement List

Approximate Comparison Table High strength low alloy structural steels

China	International Organization for Standardization	European Standard
GB	ISO	EN
Q420ME GB/T 1591-2018	S420ME ISO 630-3-2012	S420ML EN 10025-4-2004

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