MAXIMA® contains micro alloy elements including Boron, Vanadium and Niobium as finely precipitated carbides within the matrix. The fine carbides increase wear resistance without changing the basic features of the roll material. Developed for mills that can benefit from improved performance compared to using OPTIMA® in roughing and intermediate stands or as an alternative in finishing stands that are not suited to using high performance ULTIMA®.
| GRADE | MAXIMA® | MAXIMA® II | MAXIMA® III | MAXIMA® IV | MAXIMA® V | MAXIMA® VI | MAXIMA® VII |
|---|---|---|---|---|---|---|---|
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C: 3.0 - 4.0% Ni: 2.5 - 4.0% Cr + Mo + W: 2% Ti + V + Nb: 2% |
Rod and Bar Roughing and Intermediate Stands |
Rod and Bar Intermediate and Finishing Stands, Light Sections, Seamless Tube Mills |
Rod and Bar Finishing Stands Flat Passes and Narrow Flats |
Rod and Bar Finishing Stands, Rounds, Flat Passes and Narrow Flats, Light Section |
Rings for Seamless Tube Mills |
Vertical Rings for Universal Mills |
Horizontal Sleeves for Universal Mills |
| HSc | 55-70 | 60-75 | 65-80 | 70-85 | 65-75 | 60-75 | 60-75 |
| Tensile Strength MPa | 400-600 | 500-700 | 200-400 | 600-800 | 150-250 | 550-750 | 550-750 |
| Bending Strength MPa | 800-1000 | 800-1000 | 300-400 | 800-1000 | 350-500 | 700-900 | 700-900 |
| Modulus of Elasticity GPa | 160-180 | 160-170 | 170-190 | 190-210 | 170-190 | 215-225 | 215-225 |
| 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.