FLAKE GRAPHITE CAST IRON AND CASTING AND PRODUCTION METHOD THEREOF

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The present invention provides flake graphite cast iron comprising carbon in an amount of 3.2 to 3.4 wt%, silicon in an amount of 2.0 to 2.2 wt%, manganese in an amount of 1.8 to 4.0 wt%, sulfur in an amount of 0.08 to 0.14 wt%, phosphorous in an amount of less than 0.04 wt% (and more than 0 wt%), at least one rare earth element in a total amount of 0.1 to 0.3 wt%, and the remainder comprising iron, wherein the ratio of the manganese content to the sulfur content (Mn/S) is in the range of 12.0 to 50.0, the ratio of the manganese content to the total content of the rare earth elements (Mn/R.E.) is in the range of 6.0 to 40.0, and the ratio of the total content of the rare earth elements to the sulfur content (R.E./S) is in the range of 0.5 to 4.0.