Heat transfer of flat jet impingement on moving highly superheated metal sheets is investigated with 2D inverse heat conduction and 1D analytical analysis. The nickel metal sheets initially heated up to 800 °C by an electric furnace are quenched with a water temperature of 21 °C. The thermal data of the sheet being quenched is recorded using high speed an infrared camera from the backside of the sheet. The measured temperatures are used in the 2D inverse heat conduction problem to estimate heat flux and surface temperatures on the quenching side. Assuming that there is no significant temperature difference between measuring and quenching sides, the 1D analytical method is used for thin sheets. The process parameters, like sheet thickness and plate velocity, are varied. It is determined that maximum heat flux arises by increasing plate velocity and thickness. Furthermore, the water film ejection phenomenon is highly influenced by sheet thickness and plate velocity.