Nodular cast iron rolls (rings) are characterized by the nodular shaped graphite in the microstructure. Through adjusting the alloy elements of Ni, Cr, Mo and heat treatment technique, the different type of rolls (rings) of popular nodular graphite cast iron, large scale alloyed nodular graphite cast iron, pearlitic nodular graphite cast iron and acicular nodular graphite cast iron ban be manufactured. All these types of rolls (rings) have high strength, excellent thermal properties and resistance to accidents and there is very little hardness drop in the surface work layer.