Hi all,

I need your opinions on the matter of yield strength at higher temperature, over 1000'F, which are not listed in Table Y-1 of Part D, ASME SEC.II.
For example, what shall I do if I need yield strength of N06600(inconel 600) at 1100'F. Can I use extrapolation from table Y-1? Or can I use the value from the manufacturer's publication?
If I can use manufacturer(Special Metals)'s data, do I have something to do for getting approval by the owner?

Please share your experience about this situation.

Regards,