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Welcome to the Next Generation of Sealing ... - CE Franklin Ltd.

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Bolting Data<br />

SPEC<br />

GRADE<br />

Design Stress Values (ksi) vs Temperature<br />

TEMPERATURE °F/°C<br />

650/345 700/370 750/400 800/425 850/455 900/480 950/510 1000/540 1050/565 1100/595<br />

B6 21.2 21.2 21.2 19.6 15.6 12.0<br />

B7 * 25.0 25.0 23.6 21.0 17.0 12.5 8.5 4.5<br />

ASTM<br />

A193 B7M * 20.0 20.0 20.0 18.5 16.2 12.5 8.5 4.5<br />

B8-CL1 11.2 11.0 10.8 10.5 10.3 10.1 9.9 9.7 9.5<br />

B16 25.0 25.0 25.0 25.0 23.5 20.5 16.0 11.0 6.3 2.8<br />

ASTM L7 20.0 20.0 20.0 20.0 16.2 12.5 8.5 4.5<br />

A320<br />

ASTM 660 20.2 20.1 20.0 19.9 19.9 19.9 19.8 19.8<br />

A453<br />

* For Bolt Diameters ≤ 2-1/2”<br />

Please note that <strong>the</strong> above values are for reference purposes only. Values are extracted from ASME or BS 5500.<br />

Recommended Working Temperatures<br />

<strong>of</strong> Bolt Materials<br />

Stress Retention Properties<br />

<strong>of</strong> Bolt Materials<br />

MATERIAL<br />

TEMPERATURE °F/°C<br />

MIN.<br />

MAX.<br />

Carbon Steel -20/-30 570/300<br />

B7 -20/-30/ 750/400<br />

L7 -150/-100 750/400<br />

B6 -20/-30 950/510<br />

B8 -325/-200 1075/580<br />

B16 -20/-30 975/525<br />

B17/660 -20/-30 1200/650<br />

Residual Stress (% <strong>of</strong> initial stress)<br />

100<br />

75<br />

50<br />

25<br />

0<br />

0<br />

B8<br />

Carbon Steel<br />

B8M<br />

212 392 572 752 932 1112 1292 1472<br />

B7<br />

B16<br />

B17/660<br />

B80A<br />

B80A -420/-250 1400/760<br />

Temperature °F<br />

Inconel 625 -420/-250 1500/815<br />

Inconel 718 -420/-250 1400/760<br />

Stress relaxation behavior <strong>of</strong> various bolting materials showing<br />

percentage <strong>of</strong> initial stress retained at temperature<br />

<strong>Welcome</strong> <strong>to</strong> <strong>the</strong> <strong>Next</strong> <strong>Generation</strong> <strong>of</strong> <strong>Sealing</strong> Technology<br />

®<br />

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