Bolt Fatigue Strength
Bolt Fatigue Strength
(OP)
Hello,
I have two questions:
I have a bolt made out of CRES material (type 302), can anyone direct me to where I can find fatigue data for such a bolt material. MMPDS does not have and the aerospace materials handbook isnt much help.
thanks in advance
SH
I have two questions:
I have a bolt made out of CRES material (type 302), can anyone direct me to where I can find fatigue data for such a bolt material. MMPDS does not have and the aerospace materials handbook isnt much help.
thanks in advance
SH





RE: Bolt Fatigue Strength
thread725-178349: Bolt Fatigue
In order to understand your specific fasteners, you will need to know how the bolts will be manufactured: cold formed vs. hot headed vs. machined from bar; rolled threads vs. cut threads; strain aged vs. no post threading thermal treatment. Type 302 stainless steel strain hardens considerably during cold deformation, so it has a huge range of static/fatigue properties. Annealed 302 has a yield strength of only several hundred MPa while a heavily cold rolled spring temper 302 has a yield strength in excess of 1800 MPa.
RE: Bolt Fatigue Strength
SH
RE: Bolt Fatigue Strength
RE: Bolt Fatigue Strength
RE: Bolt Fatigue Strength
RE: Bolt Fatigue Strength
RE: Bolt Fatigue Strength
RE: Bolt Fatigue Strength
can you advise me as to how these NAS 1351 (CRES) bolts are manufactured? would they be annealed, then cold worked?
spec doesnt call out any heat treatmeant also...
SK
RE: Bolt Fatigue Strength
Those alloys cannot be heat treated or cold rolled after the manufacturing of the bolt. Usually the thread is rolled and head is cold upset so there will be some cold work on the thread and head but rest of the bolt will have the properties of the base material.
RE: Bolt Fatigue Strength
on fatigue data.
RE: Bolt Fatigue Strength
dimjim, I already spoke to manufacturer, they had nothing.
RE: Bolt Fatigue Strength
check other vendors to see if they have this
information?
RE: Bolt Fatigue Strength
http://
Regards,
Cory
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