Alloy infinite cold hard cast iron rollers, infinite cold hard cast iron rollers adopt the chamber centrifugal compound casting process production, working layer is Ni-Gr-Mo cold hard cast iron, core is high strength ball iron. The graphite is evenly distributed across the entire roll section, and its quantity and size increase with depth Because of the added alloy element such as manganese, chromium, nickel, molybdenum, coupled with the existence of a small amount of fine graphite, not only improve the roll’s resistance to spalling, thermal crack resistance and resistance to wear, such as performance, and the work layer of roller hardness drop small and high hardness, good wear resistance.