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

Written by Jerry Ratzlaff. Posted in American Society of Mechanical Engineers

American Society of Mechanical Engineers (ASME)

standards

  • ASME B16.34 - Valves Flanged, Threaded and Welding End

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

ForgingCastingPlateBarTubular
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. °F15030040060090015002500
-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