As-cast AZ91D alloy was hot extruded to fabricate wires of 3-4 millimeter in diameter.The microstructure of the wires was observed by optical microscope,and tensile properties and coefficient of thermal expansion were also measured.The results show that the AZ91D wires of 4 mm diameter can be successfully produced at the temperature range of 400 ℃ and 460 ℃.The fine equiaxed grained wires can be obtained at lower extrusion temperature.The wires possess excellent mechanical properties,the ultimate tensile st...