SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
(OP)
WHAT TO SELECT WHEN THERE ARE DIFFERENT VALUES FOR ALLOWABLE STRESS FOR THE SA-307 B(BOLTING) MATERIAL?
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SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
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SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESSSAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS(OP)
WHAT TO SELECT WHEN THERE ARE DIFFERENT VALUES FOR ALLOWABLE STRESS FOR THE SA-307 B(BOLTING) MATERIAL?
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RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
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Converting energy to motion for more than half a century
RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
WHAT IS THE `t' SHOWN IN LAST COLUMN? IF I HAVE TO CHOOSE BETWEEN THEM.. THEN WHAT CRITERIA SHALL BE FOLLOWED?
RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
Huub
- You never get what you expect, you only get what you inspect.
RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
-Christine
RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
When you roll threads the cold work diminishes with depth.
The result is that with smaller diameters you get significant cold work while with larger ones a greater portion of the interior is not cold worked.
You also see a similar result (though from a different cause) with heat treated fasteners.
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P.E. Metallurgy, consulting work welcomed
RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
-Christine
RE: SAME MATERIAL WITH DIFFERENT ALLOWABLE STRESS
The steels tensile and yield strength, thus the allowable stresses, drops when diameter increases due to fabrication process. When the thickness increases the material cooling slows and the grain structure is larger. If the material is thin, the cooling of the material during fabrication is quicker and the grain structure is smaller. Also, when the material is cold formed, the fabrication process increases the yield stress and the allowable strenght.