The paper analyses specific defects of castings produced by semi-solid casting process, especially rheocasting method SEED, which uses

mechanical swirling for reaching proper structure in semisolid state with high content of solid fraction. Heat treated alloy AlSi7Mg0.3 was

applied for producing an Engine Bracket casting part. For observing structure, metallographic observation by light and SEM microscopy

was used. To analyse the process, software ProCAST was used to simulate the movements in shot chamber and filling of the mold.