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High silicon ductile iron is 4.0% Si-0.6% Mo ferritic heat-resistant spheroidal graphite cast iron. It is mainly applied to the parts of the turbocharger (supercharger).
Parts of the turbocharger are required to have excellent heat and wear resistance because they are exposed to high temperature exhaust gas and sliding with other parts.
The exhaust gas temperature is approximately 800 ℃.