EN 10222-5 X2CrNiMoN22-5-3 | EN 1092-1 1.4462 Flanges

EN 1092-1 flanges can be made from duplex (austenitic-ferritic) stainless steel forgings EN 10222-5 X2CrNiMoN22-5-3 with steel number 1.4462. The X2CrNiMoN22-5-3/ 1.4462 steel is the European equivalent to ASTM A182 Gr. F51 (S31803). It is also called “duplex alloy 2205”. If the chromium, molybdenum and nitrogen content is kept within the upper half of the range for 1.4462, it is the exact equivalent to ASTM A182 Gr. F60 (S32205). When tested in accordance with EN ISO 3651-2, flanges made of X2CrNiMoN22-5-3/ 1.4462 forgings exhibit excellent resistance to intergranular corrosion. The flange may be furnished in any type according to EN 1092-1 including Type 01, 02, 04, 05, 11, 12, 13, 21, 32, 33, 34, 35, 36, and 37 with PN designation from PN 2.5 through PN 400. EN 0192-1 is more conservative in the upper temperature limit for 1.4462 than the ASME Boiler and Pressure Vessel Code. Generally, the maximum design temperature of X2CrNiMoN22-5-3 flange is 250°C [480°F]. Higher than this temperature at service may result in embrittlement.

Chemical Composition Requirements

Element	% by Mass
C	≤0.030
Si	≤1.00
Mn	≤2.00
P	≤0.035
S	≤0.015
Cr	21.0-23.0
Mo	2.5-3.5
Ni	4.5-6.5
N	0.10-0.22

*All values shall be based on cast analysis. For product analysis, the permissible deviations specified in Table 3 of EN 10222-5 shall apply.

Mechanical Properties at Room Temperature & Elevated Temperatures

Items	Requirements
Rp0.2 MPa	≥450
Rm MPa	680-880
A (l, %)	≥30
A (tr, %)	≥25
KV2 @20°C (l, J)	≥200
KV2 @20°C (tr, J)	≥100

*The EN 10222-5 X2CrNiMoN22-5-3/ 1.4462 flanges shall be solution annealed at the temperature between 1020°C to 1100°C, followed by a water quench.
*The thickness of the ruling section of the flange shall be no greater than 350 mm.
*R_p0.2: 0.2% proof strength at room temperature; R_m: tensile strength at room temperature.
*A (l, %): longitudinal elongation after fracture, in %; *A (tr, %): transverse elongation after fracture, in %.
*KV₂ @20°C (l, J): longitudinal impact energy absorbed at 20°C, in J unit; *KV₂ @20°C (tr, J): transverse impact energy absorbed at 20°C, in J unit.

Temp. °C	Rp0.2, MPa
100	≥360
150	≥335
200	≥315
250	≥300

*Minimum 0.2% proof strengths of EN 10225-2 X2CrNiMoN22-5-3/ 1.4462 flanges at elevated temperatures.

Temp. °C	Rm
100	590
150	570
200	550
250	540

*Minimum tensile strengths of EN 10225-2 X2CrNiMoN22-5-3/ 1.4462 flanges at elevated temperatures.

p/T Ratings

EN 1092-1 has listed EN 10222-5 X2CrNiMoN22-5-3/ 1.4462 in group 16E0. The p/T ratings indicate the maximum allowable pressure (PS, in bar unit) at the maximum allowable temperature (TS, in °C unit) are presented in tables below. RT (reference temperature) is defined as the temperature range from -10°C to and including 50°C.

PN 2.5	TS	RT	100	150	250
	PS	2.5	2.5	2.5	2.5
PN 6	TS	RT	100	150	250
	PS	6.0	6.0	6.0	6.0
PN 10	TS	RT	100	150	250
	PS	10	10	10	10
PN 16	TS	RT	100	150	250
	PS	16	16	16	16

*For PN 2.5, PN 6, PN 10, PN 16.

PN 25	TS	RT	100	150	200	250
	PS	25	25	25	25	25
PN 40	TS	RT	100	150	200	250
	PS	40	40	40	40	40
PN 63	TS	RT	100	150	200	250
	PS	63	63	63	63	63
PN 100	TS	RT	100	150	200	250
	PS	100	100	100	100	100

*For PN 25, PN 40, PN 63, PN 100.

PN 160	TS	RT	100	150	200	250
	PS	160	160	160	160	160
PN 250	TS	RT	100	150	200	250
	PS	250	250	250	250	250
PN 320	TS	RT	100	150	200	250
	PS	320	320	320	320	320
PN 400	TS	RT	100	150	200	250
	PS	400	400	400	400	400

*For PN 160, PN 250, PN 320, PN 400.