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Q355N steel grades - Q355NB Q355NC Q355ND Q355NE Q355NF steel plates

Posted:2021-08-26 10:11:11

The quality grades of Q355N steel are Q355NB Q355NC Q355ND Q355NE Q355NF. They are not only high strength steel, but also low carbon steel.

1. The chemical composition of Q355NB Q355NC Q355ND Q355NE Q355NF steel plates:

Grade	C	Si	Mn	P	S	Nb	V	Ti	Cr	Ni	Cu	Mo	N	Als
Q355NB	0.2	0.5	0.90-1.65	0.035	0.035	0.005-0.05	0.01-0.12	0.006-0.05	0.3	0.5	0.4	0.1	0.015	0.015
Q355NC				0.03	0.03
Q355ND				0.03	0.025
Q355NE	0.18			0.025	0.02
Q355NF	0.16			0.02	0.01

2. Carbon equivalent CEV (mass fraction) of Q355NB Q355NC Q355ND Q355NE Q355NF steel plates:

Thickness (mm)	≤63	＞63-100	＞100-250	＞250-400
CEV (% Max.)	0.43	0.45	0.45	Agreement

3. The impact properties of Q355NB Q355NC Q355ND Q355NE Q355NF steel plates:

Grade	The min. value of impact absorbed energy KV2 / J at the following test temperatures
	20℃		0℃		-20℃		-40℃		-60℃
	Longitudinal	Transverse	Longitudinal	Transverse	Longitudinal	Transverse	Longitudinal	Transverse	Longitudinal	Transverse
Q355NB	34	27	-	-	-	-	-	-	-	-
Q355NC	-	-	34	27	-	-	-	-	-	-
Q355ND	55	31	47	27	40b	20	-	-	-	-
Q355NE	63	40	55	34	47	27	31c	20c	-	-
Q355NF	63	40	55	34	47	27	31	20	27	16

Q355NB Q355NC Q355ND Q355NE Q355NF steel plates have high strength and good fatigue resistance; High toughness and low brittle transition temperature; Good cold formability and weldability; And they have good corrosion resistance and certain wear resistance.