Pressure-Temp. Ratings for A516 Gr.65: US Customary Unit

Temp.	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
-20~100	265	695	930	1,395	2,090	3,480	5,805
200	255	660	880	1,320	1,980	3,300	5,505
300	230	640	850	1,275	1,915	3,190	5,315
400	200	615	820	1,230	1,845	3,075	5,125
500	170	585	780	1,175	1,760	2,930	4,885
600	140	550	735	1,105	1,655	2,755	4,595
650	125	535	710	1,065	1,600	2,665	4,440
700	110	510	685	1,025	1,535	2,560	4,270
750	95	475	635	955	1,430	2,385	3,970
800	80	390	520	780	1,175	1,955	3,255
850	65	300	400	595	895	1,490	2,485
900	50	200	270	405	605	1,010	1,685
950	35	135	185	275	410	685	1,145
1,000	20	85	115	170	255	430	715

*Unit of working pressures: psig; Unit of temperature: °F.
*Upon prolonged exposure to temperature above 800°F, the carbide phase of steel may be converted to graphite. Permissible but not recommended for prolonged use above 800°F.

Pressure-Temp. Ratings for A516 Gr.65: SI Unit

Temp.	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
-29~38	18.4	48.0	64.0	96.0	144.1	240.1	400.1
50	18.2	47.5	63.3	94.9	142.4	237.3	395.6
100	17.4	45.3	60.5	90.7	136.0	226.7	377.8
150	15.8	43.9	58.6	87.9	131.8	219.7	366.1
200	13.8	42.5	56.7	85.1	127.6	212.7	354.4
250	12.1	40.8	54.4	81.6	122.3	203.9	339.8
300	10.2	38.7	51.6	77.4	116.1	193.4	322.4
325	9.3	37.6	50.1	75.2	112.7	187.9	313.1
350	8.4	36.4	48.5	72.8	109.2	182.0	303.3
375	7.4	35.0	46.6	69.9	104.9	174.9	291.4
400	6.5	32.6	43.5	65.2	97.9	163.1	271.9
425	5.5	27.3	36.4	54.6	81.9	136.5	227.5
450	4.6	21.6	28.8	43.2	64.8	107.9	179.9
475	3.7	15.7	20.9	31.3	47.0	78.3	130.6
500	2.8	11.1	14.8	22.1	33.2	55.4	92.3
538	1.4	5.9	7.9	11.8	17.7	29.5	49.2

*Unit of working pressures: bar; Unit of temperature: °C.
*Upon prolonged exposure to temperature above 425°C, the carbide phase of steel may be converted to graphite. Permissible but not recommended for prolonged use above 425°C.

The flanges made from ASTM A516 Gr.65 plates shall be blind or reducing flanges without hub in accordance with relative standards ASME B16.5, ASME B16.47, ASME B16.48. For pipe flanges, the A516 Gr.65 material can not be used over 455°C[850°F].