ASME B16.34 - Group 1.4, Pres-Temp Rating

Written by Jerry Ratzlaff on . 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 1.4 - Carbon Steel

  • [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 of in any application above 500°F.
Material

Group No.

Material Nominal

Designation

ForgingCastingPlateBarTubular
1.4 C
C-SI

C-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]

ASME B16.34 - Material Group 1.4 - Standard Class, Pressure-Temperature Rating

  • Ratings are maximum allowable working gage pressure (psig) at the temperature listed.
Temp. °F15030040060090015002500
-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