OPTIMA® is a Centrifugal Cast Double Poured (CC Duplex) Nodular (Spheroidal) Iron having a Bainitic/ Martensitic microstructure. Centrifugal Casting allows for complex alloying of Cr-Ni-Mo used in the working layer (shell) when compared to a static cast roll. This casting process combined with complex alloying structure provides high hardness with improved wear resistance while maintaining a stronger core for neck loads.
| GRADE | OPTIMA® I | OPTIMA® II | OPTIMA® III |
|---|---|---|---|
|
C: 3 - 3.5% Ni: 1.5 - 4% Cr + Mo: < 3% |
Roughing, Intermediate and Finishing Stands of Rod and Bar, Light and Medium Section Mills, Universal Stands for Structural Mills, Narrow Strip Mills and Seamless Tube Mills |
Intermediate and Finishing Stands of Rod and Bar, Light and Medium Section Mills, Universal Stands for Structural Mills, Narrow Strip Mills and Seamless Tube Mills |
Intermediate and Finishing Stands of Rod and Bar, Light Section Mills, Merchant Mills, Narrow Strip Mills and Seamless Tube Mills |
| HSc | 60-70 | 65-75 | 65-80 |
| Tensile Strength MPa | 400-600 | 500-700 | 200-400 |
| Bending Strength MPa | 800-1000 | 800-1000 | 300-400 |
| Modulus of Elasticity GPa | 160-180 | 160-180 | 110-140 |
| Microstructure |  |
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The hardness adjustment is obtained during a complex heat treatment process. For production, we need a range of 5 ShC which needs to be specified in the roll order.
Our technical team can help to determine the most suitable grade, degree of hardness and manufacturing method to meet with individual mill conditions and specifications.