Iron intermetallic phases in aluminum cast parts are differentiated based on their composition and, more importantly, by their morphologies. The beta phase is formed as thin, elongated plates, which can reach lengths of up to several millimeters. These coarse and brittle precipitates are responsible for degradation of mechanical properties, whereas other iron intermetallic phases, with more compact and Chinese script morphologies, are less detrimental. Therefore, in the case of aluminum foams, avoidance of beta phase in the ultrathin struts is a high priority to maintain the energy absorption potential. For aluminum foams produced according to the block mold casting routine, in hot molds out of gypsum bounded investment, we observed a spatial dependency of iron phase morphology. For pure aluminum and Al-7Si-0.3Mg alloy foams, beta phase platelets form in the sections close to the pouring basin, while Chinese script phases preferentially appear in the sections further away from the pouring basin. Cooling condition of fine struts has been measured and there are differences in different sections of foams, responsible for the changes of iron phases. Although the cooling rate is considerably low for formation of Chinese script phases, specific size and geometry of foam struts enhance this improvement.