8735 and 8740 Fatigue Data

[Merlin51]

Can anyone direct me to the Fatigue Life Data for these two materials: 8735(AMS 6320) and 8740 (AMS 6322). I have reviewed the material spec sheets (AMS 6320 and 6322), MIL-S-6049, MIL-HDBK-5, MMPDS-01, ANC-5, and various texts and on-line sources with no success.

The application is a simple 1/4" stud, heat treated to 150 ksi.

Can anyone point me towards a source for this data?

Thanks!

 

[TVP]

Merlin51,

Are these studs threaded fasteners? If so, then peruse the archives here at Eng-Tips for some good discussions on this topic, including the following:

thread725-178349