... ,Alloy steel,heat resistant steel, or according to requirement Hearth roll/Furnace roll:The material:nicochrome, Cr25Ni20,Alloy steel,heat resistant steel ... , or according to requirementThe specification:OD100-OD2000mmProcess:centrifugal casting(roll body), forging(shaft),Static casting(Cone)The picture is Φ1300 ... machine each one.Each machine is equipped with online roller type tester.