Back Up rolls for steel sheets Back Up rolls for steel sheets Specifications1.D80~D900mm2.C35E,C45E,100Cr6,SAE52100,etc.3 ... parts. These products have the properties of high purity, low [P],[S],[O] [H]content, less inclusions, homogeneous carbide spread, ... – FBH max 4mm5 Forging reduction ratio:≥46 Manufacturing process:steel ingot→forging→rough machining→QT→2th rough machining→induction quenching ...