S.G.Iron Rolls: pearlitic spheroidal graphite rolls are concentrated characterized by nodular graphite as against flake graphite in the normal cast iron rolls. These rolls are excellent substitutes for many conventional steel and cast iron rolls due to a combination of superior strength.

The softest grade has a pearlitic matrix containing ferrite around the graphite nodules, while the higher hardness grades have a complete pearlitic matrix. The carbide content increases pro--portionally with the hardness. accicular spheroidal graphite rolls also have a thick layer of chill. here the name of such rolls is based on the fact that the material consist of nodular graphite and carbides in under cooled austenitic pearlitic -bainitic matrix. the carbide content is considerably higher in the harder grades than the softer ones