Complex sentence: Ledeburite is not a type of steel as the carbon level is too high although it may occur as a separate constituent in some high carbon steels, it is mostly found with cementite or pearlite in a range of cast irons.
Split into simpler sentences: Ledeburite is not a type of steel as the carbon level is too high although it may occur as a separate constituent in some high carbon steels. It is mostly found with cementite or pearlite in a range of cast irons.