Because the graphite malleable iron had flocculent, fragmentation of matrix effect is small, so its mechanical properties is higher than gray cast iron, good plasticity and toughness, but malleable cast iron and forging processing. Can't malleable cast iron matrix organization is different, its performance is different also, the \"dirty\" malleable cast iron with high plasticity and toughness, and pearlite malleable cast iron has high strength, hardness and wear resistance.