Q420E - GB /T 1591-1994

Grade	Q420E
Corresponding Standard	GB /T 1591-1994 High Strength Low Alloy Structural Steels
Classification	Alloy Steel

Q420E Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^*	N ^℗	Ti	V	Nb	Al
Minimum Value	-	-	1	-	-	-	-	-	0.01	0.02	0.02	0.015	0.015
Maximum Value	0.2	0.55	1.7	0.025	0.025	0.4	0.7	0.3	0.02	0.2	0.2	0.06	-

Q420E Mechanical Properties

thickness t mm	Test Temperature	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤16	Room Temperature	520~680	≥420	≥19
16＜t≤35		520~680	≥400	≥19
35＜t≤50		520~680	≥380	≥19
50＜t≤100		520~680	≥360	≥19
specimen	-40°C				≥27

New and Old Grade Replacement List

Approximate Comparison Table Structural, Pressure Vessel and Engineering Steels

Q420E 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"!