| Customization: | Available |
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| Warranty: | Liftime Warranty |
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| Barrel Diameter: | φ300-φ850 mm | Casting Type: | Centrifugal Casting |
| Material: | Enhanced High-Speed Steel (HSS) | Hardness (For Reference) |
82-88HSD |
| Material Code: | H3-B | Hardness Drop | ≤3HSD |
| Material Instruction: | It's a newly developed wear-resistant material tailored by our company to meet the diverse process conditions of hot-rolled strip production lines. | Rolling Temperature | 780ºC-1100ºC |
| Use Periods | 8-10 Cycles | Dressing | 1.0-1.5mm |
| Application | work rolls in four-high roughing and finishing mills for hot-rolled strip steel (including endless rolling). | ||
Advantages of HBW's Strip HSS Roll
1.Superior Wear Resistance and High-Temperature Hardness
•Excellent resistance to wear and thermal softening under high-temperature conditions.
• Strong resistance to thermal cracking, roll marks, and surface defects, with uniform
2.Stable Roll Shape and Plate Shape Control
• Advanced heat treatment ensures uniform material properties with fine grain structure.
• Roll body hardness uniformity ≤3HSD, and working layer hardness variation ≤3HSD.
3.High Mechanical Strength and Toughness
•High tensile strength (≥800MPa) with excellent impact toughness and thermal cracking resistance.
•Prevents oxidation layer peeling and working layer spalling during operation.
4.Outstanding Fatigue Resistance
•Exceptional wear resistance and fatigue performance reduce single-time grinding volume.
•Each regrinding provides an operational cycle exceeding 12 hours, with a total rolling capacity over three times that of high chromium cast iron rolls.
Chemical Composition
Chemical composition is the most important means to inspection the performance of Rolls.
| HBW Standard Range 1 | ||||||||||||||
| Product | Material Code | Chemical Composition (%) | Surface Hardness (HSD) |
|||||||||||
| C | Si | Mn | Cr | Ni | Mo | V | Nb | W | P | S | Barrel | Roll Neck | ||
| Mill Roll | HSS Normal |
1.50 ~ 2.10 |
0.20 ~ 1.00 |
0.30 ~ 1.20 |
3.00 ~ 6.00 |
0.50 ~ 1.50 |
2.50 ~ 6.00 |
2.00 ~ 6.00 |
≤1.00 | 1.5-3.5 | <0.030 | ≤0.03 | 73~89 | 30~45 |
| HBW Standard Range 2 | ||||||||||||||||
| Product | Material Code | Chemical Composition (%) | Surface Hardness (HSD) |
|||||||||||||
| C | Si | Mn | Cr | Ni | Mo | V | Nb | W | P | S | Co | Others | Barrel | Roll Neck | ||
| Mill Roll | HSS Enhanced |
1.50 ~ 2.10 |
0.30 ~ 0.70 |
0.30 ~ 0.70 |
3.00 ~ 6.00 |
0.50 ~ 1.50 |
3.5 ~ 6.5 |
3.0-6.0 | ≤1.00 | 2.5-5.5 | <0.030 | ≤0.03 | ≤1.00 | ≤1.00 | 73~89 | 30~45 |
| HBW Standard Range 3 | ||||||||||||||||
| Product | Material Code | Chemical Composition (%) | Surface Hardness (HSD) |
|||||||||||||
| C | Si | Mn | Cr | Ni | Mo | V | Nb | W | P | S | Co | Others | Barrel | Roll Neck | ||
| Mill Roll | HSS High Strength |
1.5 ~ 2.10 |
0.30 ~ 0.7 |
0.30 ~ 0.70 |
3.00 ~ 6.00 |
0.50 ~ 1.50 |
4.0 ~ 7.0 |
4.5 ~ 7.5 |
≤1.00 | 4.0 ~ 7.0 |
<0.030 | ≤0.03 | ≤3.00 | ≤2.00 | 73~89 | 30~45 |
| Properties | Barrel | Core | |
| Tensile Strength | ≥800MPa | ≥450MPa | |
| Compressive Strength | ≥2500MPa | -- | |
Metallographic Structure
We are able to supply you Metallographic Structure for each order!
Metallography refers to the chemical composition of a metal or alloy and the physical & chemical states of the various components within the alloy.
A qualified metallographic Sturcture of the rolls : The structure is uniform and fine, the grains are evenly distributed, and there are no defects such as cracks, looseness and inclusions.
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