Here's why:
* Tungsten is a solid at room temperature. It doesn't transition from a liquid to a solid like water does.
* Freezing point refers to the temperature at which a liquid transitions into a solid. Since tungsten is already a solid at room temperature, it doesn't have a freezing point.
Instead of a freezing point, tungsten has a melting point of 3422 °C (6192 °F). This is the temperature at which solid tungsten transitions into a liquid.