Magnetic susceptibility measurements on the alloy series FeAl_1-xCr_x (0.05<or=x<or=0.60) indicate transitions between paramagnetic and spin glass phases for x=0.35,x=0.40 and between paramagnetic and ferromagnetic phases for x=0.50. Mossbauer experiments show the presence of static magnetic hyperfine interactions for alloys with x>or=0.35. The Mossbauer spectra illustrate the spread of electron density and hyperfine magnetic field at the iron sites. The onset of the ferromagnetic phase is explained in terms of the growth of nearest neighbour iron clusters and the critical concentration found for this alloy series 0.4<x<0.5 is compared with those observed for the analogous series FeAl_1-xCu_x and FeAl_1-xFe_x.