Alloy Indefinite Chilled Cast Iron Rolls, also known as AIC rolls or ICDP rolls, are high-Ni grain rolls with fine graphite deposits on the surface. They are mainly used in finishing stands of long product mills and hot strip mills. These rolls offer excellent resistance to thermal shock due to the presence of graphite. Their hardness can be adjusted by modifying the chemical composition or casting method, allowing the rolls to meet different application requirements. Alloy indefinite chilled rolls are generally produced by centrifugal casting, and are also referred to as ICDP rolls, or indefinite chilled double-poured rolls.
Chemical Composition
| Symbol | C | Si | Mn | Cr | Ni | Mo |
| AIC I | 2.90-3.60 | 0.60-1.20 | 0.40-1.20 | 0.70-1.20 | 0.50-1.00 | 0.20-0.60 |
| AIC II | 2.90-3.60 | 0.60-1.20 | 0.40-1.20 | 0.70-1.20 | 1.01-2.00 | 0.20-0.60 |
| AICIII | 2.90-3.60 | 0.60-1.20 | 0.40-1.20 | 0.70-1.20 | 2.01-3.00 | 0.20-1.00 |
| AICIV | 2.90-3.60 | 0.60-1.50 | 0.40-1.20 | 1.00-2.00 | 3.01-4.80 | 0.20-1.00 |
Physical Properties
| Symbol | Barrel Hardness | Roll Neck Hardness | Tensile Strength |
| AIC I | 55-72 HS | 35-55 HS | ≥400 MPa |
| AIC II | 55-72 HS | 35-55 HS | ≥400 MPa |
| AICIII | 65-78 HS | 32-45 HS | ≥400 MPa |
| AICIV | 70-83 HS | 32-45 HS | ≥400 MPa |
Recommended Applications
- Rolls for pre-finishing and finishing stands of bar mills and wire mills.
- Rings for pre-finishing stands of high-speed wire mills.
- Work rolls for the finishing final stand of hot strip mills.
- Work rolls for roughing stands and finishing stands of wide plate mills.
- Work rolls and backup rolls for hot strip plate temper mills.
- Work rolls for Steckel mills.
Product Features
- High resistance to thermal shock and surface cracking.
- Adjustable hardness range to suit different rolling applications.
- Fine graphite structure for stable performance in finishing operations.
- Suitable for long product mills, hot strip mills, plate mills, and Steckel mills.