The alloy contains about 35–50% uranium and 1.5–4.0% carbon. At least two intermetallic compounds of iron and uranium were identified: UFe and UFe. Small amounts of uranium can drastically lower the melting point of iron and vice versa.  reportedly melts at 1230 °C,  at 805 °C; a mixture of these two can have melting point as low as 725 °C, a mixture of iron and  can have melting point of 1055 °C. As ferrouranium readily dissolves in mineral acids, its chemical analysis is not problematic.