grinding steel bar size:60-90mm,3-6m hardness:45-55 even hardness;good wear-resistance ... flexibility; Grinding bar series 1, A type Size: diameter: 60-90 length: 3-6m Hardness: 45-55 Chemical element: C ... ≤0.035 Cr: ≤0.04 2, B type Size: diameter: 60-90 length: 3-6m Hardness: 45-55 chemical element: C ... S: 0.035max P:0.035max Cr: 0.28-0.60 Features:(1) Characteristics: a) High hardness and resistance b) ...