Following table details the allowable stresses for Cast Tube sheet and Tube support Materials.


Material
Temperature (1) Dead Load Stress
psi (3)
Dead Load Stress Plus
Frictional Stress,
psi (3)
°F °C
Cast Carbon Steel <=800 <=427 10700 21400
5 Cr - 1/2 Mo (A217 Gr C5) <=800 <=427 18000 36000
900 482 7500 15000
1000 538 4500 9000
1100 593 2500 5000
1150 621 1800 3600
19 Cr - 9 Ni (A297 Gr HF) (4) 1000 and below 538 17300 17300
1100 593 18670 18670
1200 649 8250 16500
1300 704 7000 14000
1400 760 3250 6500
1500 816 1900 3800
25 Cr 20 Ni (A351 HK 40) 1200 649 8180 16360
1300 704 5660 11310
1400 760 4150 8300
1500 816 2850 5700
1600 871 1800 3590
1700 927 1150 2300
1800 982 900 1800
1900 1038 550 1100
25 Cr - 35 Ni (HP45 Modified) 1800 982 1250 2500
1900 1038 700 1400
2000 1093 210 420
50 Cr - 50 Ni + Nb (A560 IN 657) 1100 593 13530 27060
1200 649 10240 20480
1300 704 7830 15660
1400 760 5100 10200
1500 816 3300 6600
1600 871 1900 3800
1700 927 1100 2200
1800 982 750 1500

Notes:

  1. For intermediate temperatures, allowable stress may be obtained from a smooth curve through the data points
  2. Casting factor of 0.8 has NOT been applied to these stress values
  3. 1 psi = 6.9 kPa
  4. Data are partially based on ultimate tensile or yield strength
  5. Unless otherwise noted, data are based on creep or rupture criteria in API STD 560

For further information on Wrought Tubesheet, please see Allowable Stresses for Wrought Tubesheet and Tube Support Materials.