Abstract: Composition for expanded granules, which comprises, per 100 parts by weight,from 60 to 90 parts by weight of a propylene homopolymer (A) having a melt flow index (MFI) from 0.1 to 20 g/10 min andfrom 40 to 10 parts by weight of a propylene random copolymer (B) containing from 3 to 20 mol % of ethylene and/or of an .alpha.-olefin having from 4 to 6 carbon atoms, the MFI of which ranges from 25 to 3000 g/10 min.Process for obtaining this composition and use of this composition for the manufacture of expanded granules and cellular articles obtained by molding these granules.