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Carbon and silicon targets are specified for each bar size in order to control the size and shape of the graphite flake.
ElementPercentageCarbon2.60–3.75%Silicon1.80–3.00%Manganese0.60–0.95%Sulfur0.07% MaxPhosphorus0.12% MaxMechanical PropertiesBrinell hardness values for nominal as-cast diameters are shown in the table. Hardness properties listed are minimum and maximum across the bar. Hardness values for rectangles and squares are a function of the height and width ratios and will be supplied on request.