In 1947 Britain h. Morrogh found that additional cerium in hypereutectic gray cast iron, make its content in more than 0.02 wt %, graphite spheres. In America in 1948 a. p. Ganganebin et al. Research suggests that adding magnesium in cast iron, then used ferrosilicon inoculation, when residual magnesium quantity is greater than 0.04 wt %, spheroidal graphite. Since then, nodular cast iron began a large-scale industrial production.
Nodular cast iron as a new engineering material development speed is amazing. World with nodular cast iron production of 50000 tons, 1949 in 1960 to 1960 tons, growth in 1970 to 5 million tons, in 1980 to 1980 tons, 9.15 million tons in 1990. In 2000 reached 15 million tons. Ductile iron production in industrial developed countries particularly fast development speed. 75% of the world's ductile iron production by the United States, Japan, Germany, Italy, Britain, France ?