Core material for conjugate heat test on motor

Hay there …
I am try to simulate a motor for heat transfer (using conjugate simulation). The difficulty is deciding a material for stator and rotor core. Usually for motor they use lamination steel or silicon steel such as JN250 (non-oriented electrical steel sheet) or similar to it. But when I try to edit a material data on Simscale I confuse with “Thermal Conductivity” and “Specific Heat”. Because for such as material they don’t have any number for that properties.
So I need some enlightenment and help for this simulation.