Q390C - GB /T 1591-2018

Grade	Q390C
Corresponding Standard	GB /T 1591-2018 High strength low alloy structural steels
Classification	Alloy Steel

Q390C 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	0.03	0.03	0.3	0.5	0.4	0.1	0.015	0.05	0.13	0.05

Q390C Mechanical Properties

condition	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	490~650	≥390	≥21
Long products and flat materials; 16<t≤40	490~650	≥380	≥21
Long products and flat materials; 40<t≤63	490~650	≥360	≥20
Long products and flat products; 63<t≤100	490~650	≥340	≥20
Long products and flat products; 100<t≤150	450~620	≥320	≥19
Long products and flat products; longitudinal				≥34
Long products and flat products; transverse				≥27

1 Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	International Organization for Standardization	Germany		France	European Standard		Russia	Sweden	United Kingdom
GB	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
Q390C	Fe690 FeE690	St70-2	1.0070	A70 A70-2	E360 Fe690-2①	1.0070	S375	1655-00 1655-01	E360

2 Approximate Comparison Table High-Quality Carbon Structural Steel

China	United States	International Organization for Standardization	Germany		France	European Standard		Russia	Sweden	United Kingdom
GB	ASTM	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
Q390C	Gr.65	Fe590	E355 St52 St52-3	1.0060	E335 ES355 TS-47a TU526	E355	1.0580	St6sp	1650	CEW5 CFS5 E335 ERW5NKM ERW5NZF

Q390C Corresponding Standards(Same grade name, different standards)

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