What is steam that has been heated above its saturation temperature called?

The term for steam that has been heated above its saturation temperature is superheated steam. This steam is produced when steam is raised to a temperature higher than the boiling point corresponding to its pressure, meaning it contains additional energy beyond what is needed to keep it in the vapor state at that pressure.

Superheated steam is important in various applications because it can do more work compared to saturated steam. For instance, it has greater thermal efficiency when used in turbines, as it expands more effectively than saturated steam, further increasing the efficiency of thermal cycles in power generation.

Wet steam refers to a mixture of liquid water and steam, while saturated steam is at the boiling point for its pressure with water present. Dry steam typically refers to steam that has no liquid water present but does not imply that it has been heated above its saturation temperature. Therefore, superheated steam is the precise term that accurately describes steam heated beyond saturation temperature.