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Pressure-Temperature Ratings for ASTM A516 Gr.70

Pressure-Temp. Ratings for A516 Gr.70: US Customary Unit

Temp.Class 150Class 300Class 400Class 600Class 900Class 1500Class 2500
-20~1002857409851480222037056170
2002606809051360203533955655
3002306558701310196532705450
4002006358451265190031705280
5001706058051205181030155025
6001405707551135170528404730
6501255507301100165027454575
7001105307101060159026554425
750955056751015152025354230
80080410550825123520553430
8506532042564095515952655
9005023030546069011501915
950351351852754106851145
10002085115170255430715
*Unit of working pressures: psig; Unit of temperature: °F.
*Upon prolonged exposure to temperature above 800°F, the carbide phase of steel may be converted to graphite. Permissible but not recommended for prolonged use above 800°F.

Pressure-Temp. Ratings for A561 Gr.70: SI Unit

Temp.Class 150Class 300Class 400Class 600Class 900Class 1500Class 2500
-29~3819.651.168.1102.1153.2255.3425.5
5019.250.166.8100.2150.4250.6417.7
10017.746.662.193.2139.8233.0388.3
15015.845.160.190.2135.2225.4375.6
20013.843.858.487.6131.4219.0365.0
25012.141.955.983.9125.8209.7349.5
30010.239.853.179.6119.5199.1331.8
3259.338.751.677.4116.1193.6322.6
3508.437.650.175.1112.7187.8313.0
3757.436.448.572.7109.1181.8303.1
4006.534.746.369.4104.2173.6289.3
4255.528.838.457.586.3143.8239.7
4504.623.030.746.069.0115.0191.7
4753.717.423.234.952.387.2145.3
5002.811.815.723.535.358.897.9
5381.45.97.911.817.729.549.2
*Unit of working pressures: bar; Unit of temperature: °C.
*Upon prolonged exposure to temperature above 425°C, the carbide phase of steel may be converted to graphite. Permissible but not recommended for prolonged use above 425°C.

The flanges made from ASTM A516 Gr.70 plates shall be blind or reducing flanges without hub in accordance with relative standards ASME B16.5, ASME B16.47, ASME B16.48. For pipe flanges, the A516 Gr.70 material can not be used over 455°C[850°F].

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