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While the graphite contained in gray iron castings consist of a schistose structure, here the graphite itself is orbicular. Because the crystallized graphite is spherical, it is slippery and abrasion resistance is greater.

This is considered for use when greater abrasion resistance is required than gray cast iron or when better mechanical properties are needed. The scope of use is broad, for example in leveraging its corrosion resistance due to the characteristically slow progress of corrosion due to the non-continuous layers of graphite.