Strain-rate effects on superplastic properties of coarse-grained Fe-27at.%Al based alloys have been examined. The alloy studied has an initial grain size of similar to1.6 mm. Tensile tests have been performed in air under initial strain rates of 1x10(-4), 1x10(-2), and 1x10(-1) sec(-1) at 800 and 900 degrees C. Elongation-to-failure obtained are at least 183%, with the maximum of 420% at 800 degrees C, 1x10(-4) sec(-1), confirming the occurrence of superplasticity. At 900 degrees C, the elongation shows a positive strain-rate dependence while a negative strain-rate dependence of elongation is observed at 800 degrees C. At 800 degrees C, the high strain-rate deformation results in a grain-migration structure and poor elongation is obtained. Yet, at 900 degrees C: the grain growth is likely to occur at the low strain rate. A better elongation is thus obtained when the high strain rate is applied to reduce the time for the grain growth. Based on the microstructure observed, it could be stated that the effect of a strain rate increased by two orders of magnitude is approximately equivalent to that of a decrease of 100 degrees C in the testing temperature. To yield a greater elongation and achieve refined grain structures after deformation, the superplastic deformation need to perform at 800 degrees C with a strain rate of 1x10(-4) sec(-1) or at 900 degrees C with 1x10(-2) sec(-1).