Steels for pressure vessels as per EN 10028-3

Standards
Europe	Material no.	D	F	I	GB	USA
EN 10028-3		DIN 17103	NFA 36-205, 36-207	UNI 7382	BS 1501	ASTM
P355N	1.0562	StE 355	A 510 AP	Fe E 355 KG	225-490 A	A 516 Gr. 70
P355NH	1.0565	WStE 355	A 510 AP	Fe E 355 KW	225-490 B	A 516 Gr. 70

Feasibility range
Grade	Thickness		Width
Grade		min.	max.	max.
P355N	2.0	8.0	1575
P355NH	2.0	8.0	1575

1) For thicknesses up to 2.5 mm maximum width is 1520 mm
2) Feasibility on the specific combination of thickness and width must be verified in the order phase

Chemical composition
Grade	C	Si	Mn	P	S	N	Ni	Ti	V	Nb	CE
	max.	max.		max.	max.	max.	max.	max.	max.	max.	max.
P355N	0.18	0.50	1.10 - 1.70	0.025	0.010	0.012	0.50	0.36	0.106	0.056	0.43
P355NH	0.18	0.50	1.10 - 1.70	0.025	0.010	0.012	0.50	0.36	0.106	0.056	0.43

Mechanical properties
Grade	Yield point min.		Tensile strength	Elongation min
	MPa		MPa	%
	s ≤ 16	s > 16
P355N	355	345	490 - 630	22
P355NH	355	345	490 - 630	22

1) s = nominal thickness in mm

Minimum yield point at elevated temperatures
Grade	Yield point at elevated temperature Rp0,2 in MPa at a test temperature in °C of
	50		100		150		200		250		300		350		400
	s ≤	s >	s ≤	s >	s ≤	s >	s ≤	s >	s ≤	s >	s ≤	s >	s ≤	s >	s ≤	s >
	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16
P275NH	266	256	250	241	232	223	213	205	195	188	179	173	166	160	156	150
P355NH	343	334	323	314	299	291	275	267	252	245	232	225	214	208	202	196

1) s = nominal thickness in mm

Notch impact energy
Grade	Position of samples	Minimum value of notch impact energy1) in J at a test temperature in °C of
	longitudinal	-50	-40	-20	0	20
P...N		-	-	45	65	75
P...NH		-	-	45	65	75
	transverse	-50	-40	-20	0	20
P...N		-	-	30	40	50
P...NH		-	-	30	40	50