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| High speed steel as an advanced technical roll material, is an important revolution of the modern steel rolling industry. Due to its unique features, it significantly increases the roll pass life, saves roll changing time, reduces roll comsuption and improves the overall benefits of the steel mills. HSS rolls, always as the first rolling solution choice, are widely used in wire & bar mills as well as plate and strip mills. | |||||||||
◆◇ Unique Features
High V, W, Cr, Mo, Nb and other alloy elements. Carbide types: MC and M2C with high hardness and good abrasion resistance.
Excellet thermal stability, high hardness and good wear resistance.
High expansion coefficient and good thermal conductivity, more conducive to control
Forming oxide film during rolling process, improving roll wear resistance significantly
Super high strength of the roll core (DCI)
◆◇ Specification
| Type | Normal | Enchanced | High Strength |
| Roll Specification | Ø280 - Ø850 mm | ||
| Density | 7.6 g/cm³ | 7.8 g/cm³ | 8 g/cm³ |
| Casting | Centrifugal Casting | ||
| Heat Treatment | HBW Patented | ||
| Hardness | General: 82-89HSD Different range based on stands | ||
| Hardness Drop | ≤3HSD | ||
| Rolling Temperature | 780℃-1100℃ | ||
| Pass Life | 4-5 times than CI Rolls | 1.3 tims than HSS Normal | 1.5 tims than HSS Normal |
| Dressing | 1.0-1.5mm | ||
| Use Periods | 8-10 Cycles | ||
| Application | Intermediate and Finishing stands in bar mill | ||
| Fours stands before pre-finishing stands in wire mill | |||
| Hot strip and plate steel working rolls | |||
| Section steel universal mill | |||
◆◇ Chemical Analysis
Material | HBW Patented Chemical Composition (%) | |||||||||||
C | Si | Mn | Cr | Ni | Mo | V | W | P & S | Nb | Co | Others | |
HSS (Alloy composition changes based on different grades) | 1.5 ~ 2.10 | 0.3 ~ 1.0 | 0.30 ~ 0.70 | 3.00 ~ 6.00 | 0.50 ~ 1.50 | 3.0 ~ 7.0 | 2.0 ~ 8.0 | 1.0 ~ 8.0 | ≤0.03 | Depends on HSS Grade | ||
◆◇ Physical Properties
| Properties | Barrel | Core | |
| Tensile Strength | ≥700MPa | ≥450MPa | |
| Compressive Strength | ≥2500MPa | -- | |
◆◇ Unique Features
High V, W, Cr, Mo, Nb and other alloy elements. Carbide types: MC and M2C with high hardness and good abrasion resistance.
Excellet thermal stability, high hardness and good wear resistance.
High expansion coefficient and good thermal conductivity, more conducive to control
Forming oxide film during rolling process, improving roll wear resistance significantly
Super high strength of the roll core (DCI)
◆◇ Specification
| Type | Normal | Enchanced | High Strength |
| Roll Specification | Ø280 - Ø850 mm | ||
| Density | 7.6 g/cm³ | 7.8 g/cm³ | 8 g/cm³ |
| Casting | Centrifugal Casting | ||
| Heat Treatment | HBW Patented | ||
| Hardness | General: 82-89HSD Different range based on stands | ||
| Hardness Drop | ≤3HSD | ||
| Rolling Temperature | 780℃-1100℃ | ||
| Pass Life | 4-5 times than CI Rolls | 1.3 tims than HSS Normal | 1.5 tims than HSS Normal |
| Dressing | 1.0-1.5mm | ||
| Use Periods | 8-10 Cycles | ||
| Application | Intermediate and Finishing stands in bar mill | ||
| Fours stands before pre-finishing stands in wire mill | |||
| Hot strip and plate steel working rolls | |||
| Section steel universal mill | |||
◆◇ Chemical Analysis
Material | HBW Patented Chemical Composition (%) | |||||||||||
C | Si | Mn | Cr | Ni | Mo | V | W | P & S | Nb | Co | Others | |
HSS (Alloy composition changes based on different grades) | 1.5 ~ 2.10 | 0.3 ~ 1.0 | 0.30 ~ 0.70 | 3.00 ~ 6.00 | 0.50 ~ 1.50 | 3.0 ~ 7.0 | 2.0 ~ 8.0 | 1.0 ~ 8.0 | ≤0.03 | Depends on HSS Grade | ||
◆◇ Physical Properties
| Properties | Barrel | Core | |
| Tensile Strength | ≥700MPa | ≥450MPa | |
| Compressive Strength | ≥2500MPa | -- | |