There is claimed an Al--Ni--Mn based alloy for die casting, squeeze casting, permanent mold casting, sand casting and/or semi-solid metal forming. The composition of this alloy includes, by weight percent: about 2-6% Ni, about 1-3% Mn, less than about 1% Fe, less than about 1% Si, the balance Al, incidental elements and impurities. It is suitable for aerospace and automotive cast parts.