The Thermal Conductivity of Gray Cast Iron constant displays the value of the thermal conductivity for gray cast iron ASTM A48 (53 W/mK).
Thermal conductivity is defined as the measurement for the heat transfer characteristics of a solid material through conduction. The thermal conductivity of most liquids and solids varies with temperature. For vapors, it also depends on pressure. The thermal conductivity of gray cast iron is 53 W/mK.
Material Properties (https://material-properties.org/what-is-cast-iron-definition/)