Thank you, yes I saw this previously. I guess I was asking for clarification on this issue. 

The reply in that link states: "If the calculated temperature exceeds the highest defined temperature for a temperature dependent material curve, ANSYS uses the maximum defined temperature to determine the material property." 

Say my highest defined enthalpy is 8.4766e+09 corresponding to 1600°C. Is this statement saying that the value of 8.4766e+09 continues to be used for all temperatures above 1600°C?

If so, how come when I enter an additional data point of 8.4766e+09 at 5000°C, I get an error about the enthalpy needing to increase? It seems like the simulation would run the same as before in this case. 

Thank you!