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Chapter 7
Steel Fasteners
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MECHANICAL PROPERTIES
OF FERRITIC STEEL BOLTING FOR HIGH TEMPERATURE SERVICE
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ASTM |
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Tempering |
Tensile |
Yield |
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A 193 |
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Temp F (C) |
Strength ksi |
Strength ksi |
% El (4D) |
% RA |
Hardness |
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Grade |
Material |
Dia. in (mm) |
min |
(MPa) min |
(MPa) min |
min |
min |
max |
| B5 |
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up to 4 (100), incl |
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| B6 |
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up to 4 (100), incl |
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| B6X |
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up to 4 (100), incl |
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| B7 |
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2 1/2 (65) and under |
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over 2 1/2 to 4 (65 to 100) |
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| B7 |
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over 4 to 7 (100 to 180) |
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| B7Ma |
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2 1/2 (65) and under |
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4 (101.6) and under |
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over 4 to 7 (101.6 to 117.8) |
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| B16 |
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2 1/2 (65) and under |
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over 2 1/2 to 4 (65 to 100) |
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over 4 to 7 (100 to 180) |
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| A.
To meet the tensile requirements, the Brinell hardness shell be over 201 HB
(94HRB). |
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