The relation between graphite shape and stereological parameter in spheroidal, compacted vermicular, flake and eutectic graphite cast irons was investigated using the texture analysing system. The analysis of standard structure diagrams relating to shape and dimension of graphite by Everest was carried out. Stereological parameters used in this study were surface area per unit volume (S
V), mean surface area of one particle per unit volume (S
VP) and three dimentional mean free distance (
λ). It has been shown that these parameters relate to various graphite shapes. Therefore, graphite shape was quantitatively classified by stereological parameters. S
V has characteristic ranges corresponding to various graphite shapes. S
V of compacted vermicular graphite was 0.035 to 0.060
μ−1, compared to which the values of spheroidal graphite was lower and flake graphite was higher. S
VP and
λ also have characteristic ranges.
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