Injection mold cooling or rather temperature control of mould is vital. Going into to the very fine difference in thermal conductivity in the different steel is not necessary. Just consider as ferrous or non ferrous. In laser squeing you can have mold cooling lines following the contour of the component.The consideration of plastic injection mold cooling in Pressure die casting is very interesting. The simulation soft wares give a very accurate picture of cooling in the Die in pressure casting. The injection mold flow also gives a broad picture of thermal dynamics within the mold injection molding. I have not tried applying the die casting simulation of thermodynamics on the moulds considering plastic as metal we can only get a pattern of cooling and it can help in deciding the cooling lines and their distance from the component.If some one has tried sharing info will be useful. Plastic injection mold temperature controllers help a lot in the process of plastic injection molding.