The body of the rollers has the advantages of dense and homogeneous tissues, excellent reliability and performance. 1.Material: 9Cr2, 9Cr2Mo, 9Cr2W, 9SiCr, 86CrMoV7, MC3A, MC3B, MC5, 9Cr3Mo, 9Cr2MoV, 8CrMoV, Semi-high speed steel2.Specification: Dia=400-850MM Weight=2-10t 3. Inspection: Bilateral agreement or GB/T13315-91 4. Finished roller qualityHardness: 90-96HShardening layer thickness(mm): ...