I'm working on adding H13 tool steel to the SolidWorks lib.   I'm using the properties defined by Matweb http://www.matweb.com/search/datasheet_print.aspx?matguid=e30d1d1038164808a85cf7ba6aa87ef7.

SolidWorks has Thermal Conductivity defined as BTU/(in*sec*°F).  I've looked a few different conversion like this https://www.engineeringtoolbox.com/thermal-conductance-conversion-d_1334.html

The closes match I can find is BTU in/(sec*ft^2*°F) or  is Btu (IT) inch/second/square foot/°F here http://www.unitconversion.org/unit_converter/thermal-conductivity.html.

Can someone help me cross this over?