Non-metallic inclusions are chemical compounds and nonmetals that are present in steel and other alloys. They are the product of chemical reactions, physical effects, and contamination that occurs during the melting and pouring process. These inclusions are categorized by origin as either endogenous or exogenous.
In steel and other alloys, non-metallic inclusions are chemical compounds and nonmetals that appear as a result of chemical interactions, physical processes, and contamination during the melting and pouring stages. They can be classified as either originating internally (endogenous) or introduced externally (exogenous).