Back Up rolls for steel sheets Back Up rolls for steel sheets Specifications1.D80~D900mm2.C35E,C45E,100Cr6,SAE52100,etc.3.Induction ... ~Dia. 900mmH13,4140,4340,EN9,EN19,EN24,EN31,51200,etc2 Material:H13,4130,4140,4150,4340,1035,1045,EN9,EN19,EN24 ...