Group 1.13: Alloy Steel 5Cr-½Mo

ASME B16.5-2020 Pressure-Temperature Ratings

Pressure Ratings > Flange > Group 1.13 — Alloy Steel 5Cr-½Mo

Units

Group 1.13: Alloy Steel 5Cr-½Mo

Materials: A182 F5a, A217 C5

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 1.13 Pressure-Temperature Ratings (psig)

Temp (°F)	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
−20	290	750	1,000	1,500	2,250	3,750	6,250
100	290	750	1,000	1,500	2,250	3,750	6,250
200	260	750	1,000	1,500	2,250	3,750	6,250
300	230	730	970	1,455	2,185	3,640	6,070
400	200	705	940	1,410	2,115	3,530	5,880
500	170	665	885	1,330	1,995	3,325	5,540
600	140	605	805	1,210	1,815	3,025	5,040
650	125	590	785	1,175	1,765	2,940	4,905
700	110	570	755	1,135	1,705	2,840	4,730
750	95	530	710	1,065	1,595	2,660	4,430
800	80	510	675	1,015	1,525	2,540	4,230
850	65	485	650	975	1,460	2,435	4,060
900	50	375	500	745	1,120	1,870	3,115
950	35	275	365	550	825	1,370	2,285
1000	20	200	265	400	595	995	1,655
1050	—	145	190	290	430	720	1,200
1100	—	100	135	200	300	495	830
1150	—	60	80	125	185	310	515
1200	—	35	45	70	105	170	285

Matching Pipe Materials — MAWP Calculators

A335 P5

ASTM A335 -P5 Alloy Steel Pipe SMLS 5Cr-1/2Mo

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.

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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