Q420B - GB /T 1591-2018 - H2ABC

中文版

Grade	Q420B
Corresponding Standard	GB /T 1591-2018 High strength low alloy structural steels
Classification	Alloy Steel

Q420B Chemical Element Composition Content (%)

Component	C ^①	Si	Mn	P ^②	S ^②	Cr	Ni	Cu	Mo	N ^⑤	Ti ^④	V ^④	Nb ^③
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	-
Maximum Value	0.2	0.55	1.7	0.035	0.035	0.3	0.8	0.4	0.2	0.015	0.05	0.13	0.05

Q420B Mechanical Properties

condition	Test Temperature	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
Long products and flat materials; t≤16		520~680	≥420	≥20
Long products and flat materials; 16<t≤40		520~680	≥410	≥20
Long products and flat materials; 40<t≤63		520~680	≥390	≥19
Long products and flat products; 63<t≤100		520~680	≥370	≥19
Long products and flat products; 100<t≤150		500~650	≥350	≥19
Long products and flat products; longitudinal					≥34
Long products and flat products; transverse					≥27

Q420B Corresponding Standards(Same grade name, different standards)

1	GB /T 1591-2008
	Q420B L04202
2	GB /T 1591-2018
	Q420B
3	GB /T 3274-2017
	Q420B L04202
4	GB /T 34199-2017
	Q420B

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