A series of steady-state, post-DNB experiments have been performed on a vertically mounted Inconel 600 tubular test section of 0.28 m length (9 mm bore, 12 mm O.D.) with forced convective upflow of water at atmospheric pressure to investigate heat transfer characteristics at subcooled inverted annular flow film boiling (IAFFB) conditions. Using directly heated hot patches, empirical results have been obtained for mass flux ranging from 50 to 500 kg/(m 2 s) and inlet subcooling to 0–30°C. The accuracy of the heat transfer coefficient evaluated from the measurements was estimated at about ± 7%, except for the first few diameters from the point of initiation of film boiling. The experimental results have been correlated using a previously developed extended Bromley model that properly incorporates the effects of all relevant independent parameters on IAFFB heat transfer. The heat transfer coefficients predicted by this model are in good agreement with the experimental measurements, with an rms error of 12.2% and a mean deviation of 10.2%. This accuracy is significantly higher than that of other previously suggested heat transfer correlations.