This paper is concerned with heat transfer from a heated surface with uniform heat flux to a two-dimensional water jet. It describes quantitatively the results on the effect of pure forced convection on heat transfer with boiling in a flow of subcooled water. Experiments were carried out in two flow fields of an impinging water jet, at the stagnation point and in the parallel flow zone. Approximation of the superposition, that is, the total heat flux at forced convective boiling consisting of pool boiling heat flux and pure convective heat flux, held fairly good up to the burn-out heat flux region.