Are fatigue tests in ASME Code Fatigue Curves or any other codes like EN also considers elevated temperature at creep range?

Many thanks in advance for your info.

They do exist - we could not have rockets to go to outer space if we didn't. But whether or not the information is available for a specific material is highly situational.

"Atlas of Fatigue Curves" offers data for various Chrome-molys, specifically in the creep range, for example. NIST may have more specific information for your application, whatever it may be.

Thanks Michael for that info.