The production of steel casting can in some cases be complicated and difficult. To produce quality castings, it requires the casting to be clean and free from any defects. One of the main casting defects is hot tearing, also known as a crack or shortness. This phenomenon represents the formation of an irreversible failure (crack) in the steel semisolid casting. The second defect that commonly occurs in casting is porosity. Porosity is often used to describe any void or hole found in a casting. To control the porosity, you need to understand its sources and causes. Porosity can occur either by gas formation, solidification shrinkage, or non-metallic compound formation, all while the metal is liquid. This experimental work is focused on reducing the porosity defects in steel casting components at a production scale. The produced casting component was strongly affected by porosity defects.