ASME B16.34 Pressure/Temperature Rating

The ASME B16.34 specification covers pressure and temperature ratings for forgings, castings, plate, bar,andtubular products. The ASME B16.34 charts show the max allowed pressure for a material depending on the product rating and the process temperature (the higher the temperature, the lower the pressure at a given rating).

GROUP 1: CARBON AND ALLOY STEEL GRADES

GROUP 1.1 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
1.1	C C-SI C-MN-SIC-MN-SI-V	A105 [1] [6] A350 Gr. LF2 [1] A350 Gr. LF6 Cl.1 [7]	A216 Gr. WCB [1]	A515 Gr. 70 [1] A516 Gr. 70 [1] [2] A537 Gr. Cl.1 [3]	A675 Gr. 70 [1] [4] [5] A105 [1] [6] A350 Gr. LF2 [1] A696 Gr. C	A672 Gr. B70 [1] A672 Gr. C70 [1]

[1] Upon prolonged exposure to temperatures above 800°F, the carbide phase of the steel may be converted to graphite. Permissible, but not recommended for prolonged use above 800°F.
[2] Not to be used over 850°F.
[3] Not to be used over 700°F.
[4] Leaded grades shall not be used where welded of in any application above 500°F.
[5] For service temperatures above 850°F, it is recommended that killed steels containing not less than 0.10% residual silicon be used.
[6] Only killed steel shall be used above 850°F.
[7] Not to be used over 500°F.

Maximum gage pressure (in psi) by temperature for Group 1.1 ASME B16.34 materials

Temp. °F	150#	300#	400#	600#	900#	1500#	2500#
-20 to 100	285	700	900	1480	2220	3705	6170
200	260	675	900	1350	2025	3375	5625
300	230	655	875	1315	1970	3280	5470
400	200	635	845	1270	1900	3170	5280
500	170	600	800	1200	1795	2995	4990
600	140	550	730	1095	1640	3735	4560
650	125	535	715	1075	1610	2685	4475
700	110	535	710	1005	1600	2665	4440
750	95	505	670	1010	1510	2520	4200
800	80	410	550	825	1235	2060	3430
850	65	270	355	535	805	1340	2230
900	50	170	230	345	515	860	1430
950	35	105	140	205	310	515	860
1000	20	50	70	105	155	260	430

GROUP 1.2 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
1.2	C-SI 2 1/2 NI 3 1/2 NI C-MN-SIC-MN-SI-V	A350 Gr. LF3 [2] A350 Gr. LF6 Cl.2 [4]	A352 Gr. LC2 [2] A352 Gr. LC3 [2] A216 Gr. WCC [1] A352 Gr. LCC [2]	A203 Gr. B [1] A203 Gr. E [1]	A350 Gr. LF3 [2]	A106 Gr. C [3]

[1] Upon prolonged exposure to temperatures above 800°F, the carbide phase of the steel may be converted to graphite. Permissible, but not recommended for prolonged use above 800°F.
[2] Not to be used over 650°F.
[3] Not to be used over 800°F.
[4] Not to be used over 500°F.

Maximum gage pressure (in psi) by temperature for Group 1.2 ASME B16.34 materials

Temp. °F	150	300	400	600	900	1500	2500
-20 to 100	290	750	1000	1500	2250	3750	6250
200	260	750	1000	1500	2250	3750	6250
300	230	730	970	1455	2185	3640	6070
400	200	705	940	1410	2115	3530	5880
500	170	665	885	1330	1995	3325	5540
600	140	605	805	1210	1815	3025	5040
650	125	590	785	1175	1765	2940	4905
700	110	570	755	1135	1705	2840	4730
750	95	505	670	1010	1510	2520	4200
800	80	410	550	825	1235	2060	3430
850	65	270	355	535	805	1340	2230
900	50	170	230	345	515	860	1430
950	35	105	140	205	310	515	860
1000	20	50	70	105	155	260	430

GROUP 1.3 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
1.3	C C-SI 2 1/2 NI 3 1/2 NI C-MN-SI	–	A352 Gr. LCB [5]	A515 Gr. 65 [1] A203 Gr. A [1] A203 Gr. D [1] A516 Gr. 65 [1] [2]	A675 Gr. 65 [1] [3] [4]	A672 Gr. B65 [1] A672 Gr. C65 [1]

[1] Upon prolonged exposure to temperatures above 800°F, the carbide phase of the steel may be converted to graphite. Permissible, but not recommended for prolonged use above 800°F.
[2] Not to be used over 850°F.
[3] Leaded grades shall not be used where welded in any application above 500°F.
[4] For service temperatures above 850°F, it is recommended that killed steel containing not less than 0.10% residual silicon be used.
[5] Not to be used over 650°F.

Maximum gage pressure (in psi) by temperature for Group 1.3 ASME B16.34 materials

Temp. °F	150	300	400	600	900	1500	2500
-20 to 100	265	695	925	1390	2085	3470	5785
200	250	655	875	1315	1970	3280	5470
300	230	640	850	1275	1915	3190	5315
400	200	620	825	1235	1850	3085	5145
500	170	585	775	1165	1745	2910	4850
600	140	535	710	1065	1600	2665	4440
650	125	525	695	1045	1570	2615	4355
700	110	520	690	1035	1555	2590	4320
750	95	475	630	945	1420	2365	3945
800	80	390	520	780	1175	1955	3260
850	65	270	355	535	805	1340	2230
900	50	170	230	345	515	860	1430
950	35	105	140	205	310	515	860
1000	20	50	70	105	155	260	430

GROUP 1.4 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
1.4	C C-SIC-MN-SI	A350 Gr. LF1 [1]	–	A515 Gr. 60 [1] [2]A516 Gr. 60 [1] [2]	A675 Gr. 60 [1] [2] [3] A350 Gr. LF1 [1] A696 Gr. B	A106 Gr. B [1] A672 Gr. B60 [1] A672 Gr. C60 [1]

[1] Upon prolonged exposure to temperatures above 800°F, the carbide phase of the steel may be converted to graphite. Permissible, but not recommended for prolonged use above 800°F.
[2] Not to be used over 850°F.
[3] Leaded grades shall not be used where welded in any application above 500°F.

Maximum gage pressure (in psi) by temperature for Group 1.4 ASME B16.34 materials:

Temp. °F	150	300	400	600	900	1500	2500
-20 to 100	235	620	825	1235	1850	3085	1545
200	215	560	750	1125	1685	2810	4680
300	210	550	730	1095	1640	2735	4560
400	200	530	705	1060	1585	2645	4405
500	170	500	665	995	1495	2490	4150
600	140	455	610	915	1370	2285	3805
650	125	450	600	895	1345	2245	3740
700	110	450	600	895	1345	2245	3740
750	95	445	590	885	1325	2210	3685
800	80	370	495	740	1110	1850	3085
850	65	270	355	535	805	1340	2230
900	50	170	230	345	515	860	1430
950	35	105	140	205	310	515	860
1000	20	50	70	105	155	260	430

GROUP 1.5 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
1.5	C-1/2MO	A182 Gr. F1 [1]	A217 Gr. WC1 [1] [2] A352 Gr. LC1 [3]	A204 Gr. A [1] A204 Gr. B	A182 Gr. F1 [1]	A691 Gr. CM-70 [1]

[1] Upon prolonged exposure to temperatures above 875°F, the carbide phase of carbon-molybdenum steel may be converted to graphite. Permissible, but not recommended for prolonged use above 875°F.
[2] Use normalized and tempered material only.
[3] Not to be used over 650°F.

GROUP 1.6 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
1.6	C-1/2MO1/2CR-1/2MO 1CR-1/2MO	–	–	A387 Gr. 2 Cl.1 [3] A387 Gr. 2 Cl.2 [3] A387 Gr. 12 Cl.1 [2]	–	A335 Gr. P1 [1] [3] A369 Gr. FP1 [1] [3] A691 Gr. 1/2CR [3]

[1] Upon prolonged exposure to temperatures above 875°F, the carbide phase of carbon-molybdenum steel may be converted to graphite. Permissible, but not recommended for prolonged use above 875°F.
[2] Permissible, but not recommended for prolonged use above 1100°F.
[3] Not to be used over 1000°F.

Maximum gage pressure (in psi) by temperature for Group 1.6 ASME B16.34 materials

Temp. °F	150	300	400	600	900	1500	2500
-20 to 100	225	590	790	1185	1775	2955	4930
200	225	590	790	1185	1775	2955	4930
300	225	590	790	1185	1775	2955	4930
400	200	570	765	1145	1775	2860	4765
500	170	550	735	1105	1655	2755	4595
600	140	535	710	1065	1600	2665	4440
650	125	525	695	1045	1570	2615	4355
700	110	510	685	1025	1535	2560	4270
750	95	475	630	945	1420	2365	3945
800	80	475	630	945	1420	2365	3945
850	65	460	615	920	1380	2295	3830
900	50	440	590	885	1325	2210	3685
950	35	315	420	630	945	1575	2630
1000	20	200	270	405	605	1010	1685
1050	20 [1]	155	205	310	465	770	1285
1100	20 [1]	95	130	190	290	480	800
1150	20 [1]	60	80	125	185	310	515
1200	15 [1]	40	50	75	115	190	315

组2:不锈钢的成绩

GROUP 2.1 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
2.1	18CR-8NI	A182 Gr. F304 [1] A182 Gr. F304H	A351 Gr. CF3 [2] A351 Gr. CF8 [1]	A240 Gr. 304 [1] A240 Gr. 340H	A182 Gr. F304 [1] A182 Gr. F304H A479 Gr. 304 [1] A479 Gr. 304H	A312 Gr. TP304 [1] A312 Gr. TP304H A358 Gr. 304 [1] A376 Gr. TP304 [1] A376 Gr. TP304H A430 Gr. FP304 [1] A430 Gr. FP304H

[1] At temperatures over 1000°F, use only when the carbon content is 0.04% or higher.
[2] Not to be used over 800°F.

Maximum gage pressure (in psi) by temperature for Group 2.1 ASME B16.34 materials

Temp. °F	150	300	400	600	900	1500	2500
-20 to 100	275	720	960	1440	2160	3600	6000
200	230	600	800	1200	1800	3000	5000
300	205	540	720	1080	1620	2700	4500
400	190	495	660	995	1490	2485	4140
500	170	465	620	930	1395	2330	3880
600	140	435	580	875	1310	2185	3640
650	125	430	575	860	1290	2150	3580
700	110	425	565	850	1275	2125	3540
750	95	415	555	830	1245	2075	3460
800	80	405	540	805	1210	2015	3360
850	65	395	530	790	1190	1980	3300
900	50	390	520	780	1165	1945	3240
950	35	380	510	765	1145	1910	3180
1000	20	320	430	640	965	1605	2675
1050	20 [1]	310	410	615	925	1545	2570
1100	20 [1]	255	345	515	770	1285	2145
1150	20 [1]	200	265	400	595	995	1655
1200	20 [1]	155	205	310	465	770	1285
1250	20 [1]	115	150	225	340	565	945
1300	20 [1]	85	115	170	255	430	715
1350	20 [1]	60	80	125	185	310	515
1400	20 [1]	50	65	95	145	240	400
1450	15 [1]	35	45	70	105	170	285
1500	10 [1]	25	35	55	80	135	230

[1]使用对接焊缝只阀门。法兰端老鼠ing stop at 1000°F.

GROUP 2.2 ASME B16.34 PRESSURE AND TEMPERATURE RATINGS

[1] At temperatures over 1000°F, use only when carbon content is 0.04% or higher.
[2] Not to be used over 650°F.
[3] Not to be used over 850°F.
[4] Not to be used over 1000°F.

Maximum gage pressure (in psi) by temperature for Group 2.2 ASME B16.34 materials

GROUP 3: NICKEL ALLOY GRADES

MaterialGroup No.	Material NominalDesignation	Forging	Casting	Plate	Bar	Tubular
3.1	35NI-35FE-20CR-CB	B462 Gr. N08020	–	B463 Gr. N08020	B473 Gr. N08020	B464 Gr. N08020 B468 Gr. N08020
3.2	99NI	B160 Gr. N02200	–	B162 Gr. N02200	B160 Gr. N02200	B161 Gr. N02200 B163 Gr. N02200
3.3	99NI-Low C	B160 Gr. N02201	–	B162 Gr. N02201	B160 Gr. N02201	–
3.4	67NI-30CU67NI-30CU-S	B564 Gr. N04400B564 Gr. N04405	–	B127 Gr. N04400	B164 Gr. N04400B164 Gr. N04405	B165 Gr. N04400 B163 Gr. N04400
3.5	72NI-15CR-8FE	B564 Gr. N06600	–	B168 Gr. N06600	B166 Gr. N06600	B167 Gr. N06600 B163 Gr. N06600
3.6	33NI-42FE-21CR	B564 Gr. N08800	–	B409 Gr. N08800	B408 Gr. N08800	B163 Gr N08800。
3.7	65NI-28MO-2FE	B335 Gr. N10665	–	B333 Gr. N10665	B335 Gr. N10665	B662 Gr. N10665
3.8	54NI-16MO-15CR 60NI-22CR-9MO-3.5CB 62NI-28MO-5FE 70NI-16MO-7CR-5FE 61NI-16MO-16CR 42NI-21.5CR-3MO-2.3CU	B564 Gr. N10276 B564 Gr. N06625 B335 Gr. N10001 B573 Gr. N10003 B574 Gr. N06455 B425 Gr. N08825	–	B575 Gr. N10276 B443 Gr. N06625 B333 Gr. N10001 B434 Gr. N10003 B575 Gr. N06455 B424 Gr. N08825	B574 Gr. N10276 B446 Gr. N06625 B335 Gr. N10001 B573 Gr. N10003 B574 Gr. N06455 B425 Gr. N08825	B622 Gr. N10276B622 Gr. N10001B622 Gr. N06455 B423 Gr. N08825
3.9	47NI-22CR-9MO-18FE	B572 Gr. N06002	–	B435 Gr. N06002	B572 Gr. N06002	B622 Gr. N06002
3.10	25NI-47FE-21CR-5MO	B672 Gr. N08700	–	B599 Gr. N08700	B672 Gr. N08700	–
3.11	44FE-25NI-21CR-MO	B649 Gr. N08904	–	B625 Gr. N08904	B649 Gr. N08904	B677 Gr. N08904
3.12	26NI-43FE-22CR-5MO 47NI-22CR-20FE-7MO	B621 Gr. N08320 B581 Gr. N06985	–	B620 Gr. N08320 B582 Gr. N06985	B621 Gr. N08320 B581 Gr. N06985	B622 Gr. N08320 B622 Gr. N06985
3.13	49NI-25CR-18FE-6MO NI-FE-CR-MO-CU-Low C	B581 Gr. N06975 B564 Gr. N08031	–	B582 Gr. N06975 B625 Gr. N08031	B581 Gr. N06975 B649 Gr. N08031	B622 Gr. N06975 B622 Gr. N08031
3.14	47NI-22CR-19FE-6MO	B581 Gr. N06007	–	B582 Gr. N06007	B581 Gr. N06007	B622 Gr. N06007
3.15	33NI-2FE-21CR NI-MO NI-MO-CR	B564 Gr. N08810	B494 Gr. N-12MW B494 Gr. CW-12MW	B409 Gr. N08810	B408 Gr. N08810	B407 Gr. N08810
3.16	35NI-19CR-1 1/4SI	B511 Gr. N08330	–	B536 Gr. N08330	B511 Gr. N08330	B535 Gr. N08330
3.17	29NI-20.5CR-3.5CU-2.5MO	–	A351 Gr. CN-7M	–	–	–

Maximum gage pressure (in psi) by temperature for Group 3.1 ASME B16.34 materials