Fatigue curve for duplex stainless steel
Fatigue curve for duplex stainless steel
(OP)
I am currently running a CAESAR II pipe stress analysis to ultimately evaluate the remaining fatigue life of a piping system. The material is A790 (S31803) at about 300 degrees F. Does anybody have a fatigue curve for this material that goes out to at least 50 X 10E6 cycles.? There are preloaded fatigue curves in CAESAR that are from ASME Section VIII Division 2 chapter 5 but I don't know which of these preloaded curves most closely matches the duplex stainless steel for my application.
Regards,
Pat
Regards,
Pat





RE: Fatigue curve for duplex stainless steel
There are 3 global methods that solve fatigue problems:
- The S-N Method
- The EPSILON-N Method
- The Linear Elastic Fracture Mechanics
Only the Linear Elastic Fracture Mechanics can predict the remaining life of a structure/component. I suggest you to use this method in your problem .Regards,