|Fe-2 wt.%Ni alloys were fabricated by metal powder injection molding, and their oxidation behavior at 600-700oC for 30 h in air was studied in order to find the effect of the small addition of Ni in the iron matrix on the high-temperature oxidation. Oxide scales that formed after oxidation consisted primarily of Fe₂O₃, where microscopic voids were scattered. Nickel was segregated initially at the scale/matrix interface, and later at the lower part of the Fe₂O₃ scale. At 600℃, Fe-2wt.%Ni alloys oxidized parabolically initially, and linearly after 15 h. At 650-700℃, they oxidized linearly from the initial period. Although Fe-2wt.%Ni alloys oxidized slower than pure iron, their oxidation rates were relatively fast.