The Thermal Conductivity of Tool Steel constant displays the value of the thermal conductivity for A2 tool steel (26 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 A2 tool steel is 26 W/mK.
Material Properties (https://material-properties.org/tool-steel-density-strength-hardness-melting-point/)