Q420D L04204 - GB /T 1591-2008

Grade	Q420D
China ISC	L04204
Corresponding Standard	GB /T 1591-2008 High Strength Low Alloy Structural Steels
Classification	Alloy Steel
Properties	Strength Weldability

Q420D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	Ti	V	Nb	Al ^b
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	-	0.015
Maximum Value	0.2	0.5	1.7	0.03	0.025	0.3	0.8	0.3	0.2	0.015	0.2	0.2	0.07	-

Q420D 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	520~680	≥420	≥19
16≤t＜40	520~680	≥400	≥19
40＜t≤63	520~680	≥380	≥18
63＜t≤100	520~680	≥360	≥18
100＜t≤150	500~650	≥340	≥18

Approximate Comparison Table Structural, Pressure Vessel and Engineering Steels

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST
Q420D	SM490A SM490C	A255Gr.D A633E	E420	StE420	E420R	S420N FeE420KGN	1.8902	16G2AF

Q420D 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"!