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ASME Vessel Code Allowable Stresses

ASME Vessel Section II, Part D, Table 1B

Customary Metric
Metal Temperatures Not Exceeding Maximum Allowable Stress Values Metal Temperatures Not Exceeding Maximum Allowable Stress Values
Standard Note (1) Standard Note (1)
°F ksi ksi °C MPa MPa
100 30.0 30.0 40 207 207
200 28.2 30.0 65 200 207
300 26.4 30.0 100 193 207
400 24.7 30.0 125 188 207
500 23.1 30.0 150 182 207
600 22.0 29.4 175 176 207
650 21.5 29.1 200 171 207
700 21.2 28.7 225 166 207
750 21.0 28.4 250 161 207
800 20.9 28.2 275 157 206
850 20.9 28.2 300 153 206
900 20.9 28.2 325 150 203
950 20.9 28.2 350 148 200
1000 20.9 28.2 375 146 197
1050 20.9 28.2 400 145 196
1100 20.9 23.2 425 144 195
1150 19.0 19.0 450 144 195
1200 15.6 15.6 475 144 195
1250 12.9 12.9 500 144 195
1300 10.6 10.6 525 144 195
1350 8.5 8.5 550 144 195
1400 6.7 6.7 575 144 183
1450 5.3 5.3 600 144 153
1500 4.1 4.1 625 128 128
1550 2.9 2.9 650 107 107
1600 2.1 2.1 675 89.7 89.7
1650 1.5 1.5 700 74.7 74.7
1700 1.1 1.1 725 61.9 61.9
1750 0.70 0.70 750 50.8 50.8
1800 0.45 0.45 775 41.1 41.1
- - - 800 32.8 32.6
- - - 825 25.2 25.2
- - - 850 18.9 18.9
- - - 875 13.8 13.8
- - - 900 10.2 10.2

NOTE (1)
Due to the relatively low yield strength of this material, these higher stress values were established at temperatures where the short time tensile properties govern to permit the use of these alloys where slightly greater deformation is acceptable. These higher stress values exceed 67%, but do not exceed 90% of the yield strength at temperature. Use of these stresses may result in dimensional changes due to permanent strain. These stress values are not recommended for flanges of gasketed joints or other applications where slight amounts of distortion can cause leakage or malfunction.

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