ASME B16.34 - Group 2.1, Pres-Temp Rating

ASME B16.34 - Materials in Group 2.1 - Austenitic Steel [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.
Material Group No.	Material Nominal Designation	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

ASME B16.34 - Material Group 2.1 - Standard Class, Pressure-Temperature Rating Ratings are maximum allowable working gage pressure (psig) at the temperature listed. [1] Use with buttweld valves only. Flanged end rating stop at 1000°F.
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

ASME B16.34 - Materials in Group 2.1 - Austenitic Steel