In order to produce economical tungsten alloys with superior mechanical properties, 93W-4.6Ni-2.4Fe (wt.%) tungsten heavy alloys were fabricated by ball milling (BM) and liquid phase sintering (LPS) at a temperature range of 1450-1510°C. The microstructure and the fracture modes of the specimens were further examined. The specimens sintered at different temperatures display similar dul-phase microstructure and ductile fracture modes. With the increase of the sintering temperature, the tungsten particle size also gradually grows. At and above the temperature of 1480°C, the relative density reaches above 99.0%. The optimal sintering temperature of the specimen with the best tensile strength (940 MPa) and elongation (32.6%) combination is determined to be 1480°C. The excellent ductility of the specimen sintered at 1480°C is associated with the network structure of γ phase, the uniform distribution of dimples and the synergistic effect of these two phases. The high strength of the specimen is attributed to the refined tungsten particle size and the spherical tungsten particles.