]Properties of Al_(86)Ni_6Ce₄Mg₄, alloy powder produced by helium gas atomization process were investigated by using DSC, XRD, SEM and TEM. The powders below 32㎛ in diameter were identified as an amorphous phase mixed with a α-Al phase. Al_(86)Ni_6Ce₄Mg₄, bulk alloy was manufactured by hot extruding the alloy powders at various temperatures, and the estimation of its mechanical properties was carried out subsequently. As a result, the bulk alloy extruded at the temperature below 450℃ exhibited the microstructure in which the near-spherical shape of some powders below 20㎛ were nearly unchanged and fine voids between matrix and powders were formed during extrusion process. On the other hand, the tensile strength and elongation at room temperature for Al_(86)Ni_6Ce₄Mg₄, bulk alloy extruded at 450℃ were 750㎫ and 7.5%, respectively.