Back Up rolls for steel sheets Back Up rolls for steel sheets Specifications1.D80~D900mm2.C35E,C45E,100Cr6,SAE52100, ... NameSpecificationMaterialWork RollDia. 60~ Dia. 1000mm9Cr2Mo, 86CrMoV7,MC3,MC5,etc.Back Up RollDia. 240~ Dia. 1500mm9Cr2Mo, MC3,MC5,etc.Intermediate ... FBH max 4mm5 Forging reduction ratio:≥46 Manufacturing process:steel ingot→forging→rough machining→QT→2th rough machining→induction ...