ASTM A487 CA6NM Class B High Temperature Properties

Hi all,

It seems ASME Section II D only provides high temp (to 800 F) properties of CA6NM Class A, not class B. Is there any other source to get the high temp data of CA6NM Class B (up to 800F)? Or could we simulate it by multiplying a factor with that of Class A at each temp gradient?

Thank you!