Steels for welded gas bottles as per EN 10120

Standards
Europe	Material no.	D	F	I	GB	J
EN 10120		DIN 17155	NFA 36-211	UNI 7355	BS 5045	JIS G 3116
P245NB	1.0111	H I	BS 1	Fe E 24 KR	Type A	SG 255
P265NB	1.0423	H II	BS 2	Fe E 27 KR	Type B	SG 295
P310NB	1.0437	17 Mn 4	BS 3	Fe E 31 KR	Type C	SG 325
P355NB	1.0557	19 Mn 6	BS 4	Fe E 35 KR	Type E	SG 365

Feasibility range
Grade	Thickness		Width
Grade		min.	max.	max.
P245NB	1.5	10.75	1300
P265NB	1.5	10.75	1300
P310NB	1.7	8.0	1575
P355NB	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	Al	Ti	Nb
	max.	max.	min.	max.	max.	max.	min.	max.	max.
P245NB	0.16	0.25	0.30	0.025	0.015	0.009	0.020	0.03	0.050
P265NB	0.19	0.25	0.40	0.025	0.015	0.009	0.020	0.03	0.050
P310NB	0.20	0.50	0.70	0.025	0.015	0.009	0.020	0.03	0.050
P355NB	0.20	0.50	0.70	0.025	0.015	0.009	0.020	0.03	0.050

Mechanical properties
Grade	Yield point min.	Tensile strength	Elongation min[%]
	MPa	MPa	L₀= 80 mm	L₀ = 5,65 √S₀
			s < 3	s ≥ 3
P245NB	245	360 - 450	26	34
P265NB	265	410 - 500	24	32
P310NB	310	460 - 550	21	28
P355NB	355	510 - 620	19	24

1) s = nominal thickness in mm