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Fatigue curve for duplex stainless steel

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

RE: Fatigue curve for duplex stainless steel

Welcome to the forum Kat0430!

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,

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