Oxidation, carburization and/or sulfidation resistant iron aluminide alloy

The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, 1% Cr and either 0.05% Zr or Zrostringers extending perpendicular to an exposed surface of the heating element or 0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, 2% Ti, 2% Mo, 1% Zr, 1% C, 0.1% B. 30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, 1% rare earth metal, 1% oxygen, 3% Cu, balance Fe.