Cast iron with improved oxidation resistance at high temperatures

   
   

An iron cast having iron as a major component, and including C, Si, Mn, Cr, Mo and Ni, where the cast iron provides excellent heat resistance and oxidation resistance at high temperatures. The cast iron beneficially contains between 2.5 to 3.0% of C; 2.0 to 3.0% of Si; 0.8 to 1.2% of Mn; 1.7 to 3.0% of Cr; 0.025 to 0.06% of Mg; 0.15 to 0.4% of Mo; and 17.0 to 20.0% of Ni; but less than 0.1% of P; and less than 0.02% of S. The cast iron is suitable for extremely severe conditions at high temperatures, and can be used for an exhaust manifold for engines where temperature of the manifold may reach 850.degree. C.

Un hierro echado teniendo hierro como componente importante, e incluyendo C, el silicio, el manganeso, el cr, el MES y el Ni, donde el hierro fundido proporciona resistencia térmica excelente y resistencia de la oxidación en las altas temperaturas. El hierro fundido contiene beneficioso entre 2.5 a 3.0% de C; 2.0 a 3.0% de silicio; 0.8 a 1.2% del manganeso; 1.7 a 3.0% de cr; 0.025 a 0.06% de magnesio; 0.15 a 0.4% del MES; y 17.0 a 20.0% de Ni; pero menos de 0.1% de P; y menos de 0.02% de S. El hierro fundido es conveniente para las condiciones extremadamente severas en las altas temperaturas, y se puede utilizar para un múltiple del extractor para los motores donde la temperatura del múltiple puede alcanzar 850.degree. C.

 
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