Titanium time-depndent properties

[CrisDom]

Dear All,
I've to design a vessel using Titanium (SB-265 Gr.2).
Design T is 300°C and, based on ASME Sect.IID, it seems to me that no creep phenomena are foreseen (indeed no note T relevant to time-dependent properties are recalled for Titanium materials).
Is that correct?
Actually an old Italian specification highlighted that Titanium is subject to creep phenomena even at ambient temperatures, but no values for σR/100000/t are available.

Can anybody give me his/her opinion on that?

Thanks to all!

Regards

 

[EdStainless]

I have never seen short term creep data below 300C, but I have seen 100hr data for 350C in CP Ti.
Take a hint from the serious strength drop from RT to 300C, isn't it about 1/2?
Try this for starters

https://www.spacematdb.com/spacemat/manudatasheets/TITANIUM ALLOY GUIDE.pdf

You have to be very careful with CP Ti as the properties can be highly directional. I have seen strength and modulus vary by over 33% depending on orientation. This isn't a cubic structure material. If this is thick plate I would require testing in all three orientations (L-t, S-t, and Z).

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[goutam_freelance]

Some study report available in link below:
Link

Engineers, think what we have done to the environment !

https://www.linkedin.com/in/goutam-das-59743b30/