**2.1 Die casting machine and die**

A 500 kN cold chamber die casting machine (Hishinuma Machinery HC 50F) with an injection power of 100 kN and a sleeve diameter of 45 mm was used in this study. The plunger speed was 1.6 m/s. The test piece used for the tensile test and the spiral die used for the fluidity test are shown in **Figure 1**.
