Nodular pearlitic rolls are widely used for hot rolling applications in different type of Roughing, Intermediate & finishing stands. The material consists of nodular graphite and carbides in pearlitic matrix.
Depending on the primary requirements (Whether thermal shocks/cracks, crack penetrations or wear resistance etc.) there are variety of Cr, Ni, Mo alloyed grades used considering the rolling mill operational conditions and groove / caliber design. The carbide is relatively higher in alloyed compared with standard grades.
| Hardness | C | Mn | Si | P | S | Ni | Cr | Mo |
|---|---|---|---|---|---|---|---|---|
| 50-55 | 3.00/3.50 | 0.40/0.70 | 1.50/2.20 | 0.050 MAX | 0.020MAX | 1.30/1.80 | 0.50 MAX | 0.40 MAX |
| 55-60 | 3.20/3.50 | 0.50/0.70 | 1.50/2.00 | 0.050 MAX | 0.020 MAX | 1.60/2.20 | 0.60 MAX | 0.50 MAX |
| 60-65 | 3.30/3.50 | 0.60/0.80 | 1.20/1.80 | 0.050 MAX | 0.020 MAX | 2.00/2.50 | 0.80 MAX | 0.70 MAX |
