  The comprehensive knowledge of fundamental parameters of single stars is the
basis of the modelling of star clusters and galaxies. Most fundamental stellar
parameters of the individual components in SB2 eclipsing binaries are known
with very high accuracy. Unfortunately, while masses and radii are well
determined, the temperatures strongly depend on photometric calibrations. In
the present work, we have used an empirically-calibrated grid of theoretical
stellar spectra (BaSeL models) for simultaneously deriving homogeneous
effective temperatures and metallicities from observed data. For this purpose,
we have selected 20 binary systems (40 stars) for which we have uvby Stromgren
photometry with estimated errors (see Lastennet et al., astro-ph/9811103, for
details).
