MMPDS 6061-T6 Fty vs Temp

[ihopeitworks]

I'm looking at the Tensile Yield Strength of 6061-T6 at various temperatures and found in MMPDS two tables that are different from one another. Which table would you use and why? Their descriptions are basically the same, but the chart is completely different.

I'm using MMPDS ver 10 (1 April 2015), page 3-444 and 3-445

I'm trying to figure out which Fty to use at 700 or 800 F.

 

[Compositepro]

The difference appears to be that one is strength at room temperature and the other is strength at temperature. Rather a subtle difference in wording but big difference in meaning.