Group 2.5: Austenitic SS 18Cr-10Ni-Cb

ASME B16.5-2020 Pressure-Temperature Ratings

Pressure Ratings > Flange > Group 2.5 — Austenitic SS 18Cr-10Ni-Cb

Units

Group 2.5: Austenitic SS 18Cr-10Ni-Cb

Materials: A182 F347/F347H/F348, A240-347/348

Pressure-Temperature Curve

Class 150
Class 1500
Class 2500
Class 300
Class 400
Class 600
Class 900

Interpolation Calculator

Calculate allowable working pressure at any intermediate temperature by linear interpolation.

Class

Temperature

Group 2.5 Pressure-Temperature Ratings (psig)

Temp (°F)	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
−20	275	720	960	1,440	2,160	3,600	6,000
100	275	720	960	1,440	2,160	3,600	6,000
200	255	660	885	1,325	1,985	3,310	5,520
300	230	615	820	1,235	1,850	3,085	5,140
400	200	575	770	1,150	1,730	2,880	4,800
500	170	540	725	1,085	1,625	2,710	4,520
600	140	515	690	1,030	1,550	2,580	4,300
650	125	505	675	1,015	1,520	2,530	4,220
700	110	495	660	995	1,490	2,485	4,140
750	95	490	655	985	1,475	2,460	4,100
800	80	485	650	975	1,460	2,435	4,060
850	65	485	645	970	1,455	2,425	4,040
900	50	450	600	900	1,350	2,245	3,745
950	35	385	515	775	1,160	1,930	3,220
1000	20	365	485	725	1,090	1,820	3,030
1050	—	360	480	720	1,080	1,800	3,000
1100	—	325	430	645	965	1,610	2,685
1150	—	275	365	550	825	1,370	2,285
1200	—	205	275	410	620	1,030	1,715
1250	—	180	245	365	545	910	1,515
1300	—	140	185	275	410	685	1,145
1350	—	105	140	205	310	515	860
1400	—	75	100	150	225	380	630
1450	—	60	80	115	175	290	485
1500	—	40	55	85	125	205	345

Matching Pipe Materials — MAWP Calculators

A312 TP347

ASTM A312 TP347 SS Pipe Smls 18Cr-10Ni-Cb

Disclaimer: This chart is for guidance only. The data is from ASME B16.5-2020 and shall not be used for design without verification against the current edition of the standard. Ambient ratings apply from −20 °F (−29 °C) to 100 °F (38 °C). Rows highlighted in blue indicate the ambient temperature range.

← Group 2.4 Group 2.7 →

References

ASME B16.5-2020 — Pipe Flanges and Flanged Fittings: NPS ½ Through NPS 24 Metric/Inch Standard
Pressure ratings are maximum allowable non-shock working pressures (psig or bar gauge)
Intermediate temperatures may be interpolated linearly between tabulated values
Ratings apply to flanged fittings of the designated class, including flanges, flanged valves, and flanged end fittings
For temperatures below −20 °F (−29 °C), consult ASME B16.5 for specific material limitations