What are Indefinite Chill Cast Iron Rolls?
Indefinite Chill Cast Iron Rolls are a versatile class of cast iron rolls that combine the wear resistance of a chilled structure with the toughness and strength of a grey iron core. Unlike ordinary Chilled Cast Iron Rolls, ICCI Rolls have a controlled chilled layer with graphite distributed throughout the matrix, which gives them unique performance advantages.
Properties of Indefinite Chill Cast Iron Rolls
| Material Category | Material Name | Code | C | Si | Mn | P | S | Cr | Ni | Mo | V | Surface Hardness (HSD) | Application |
| Infinite Chilled Cast Iron | Chromium – molybdenum infinite chilled | IC | 2.90~3.60 | 0.60~1.20 | 0.40~1.20 | ≤0.25 | ≤0.08 | 0.60~1.20 | – | 0.20~0.60 | – | 60~70 (Barrel) / 32~50 (Neck) | Medium/small section steel, bar, wire rod roughing, strip mill work rolls |
| Nickel – chromium – molybdenum infinite chilled Ⅰ | IC I | 2.90~3.60 | 0.60~1.20 | 0.40~1.20 | ≤0.25 | ≤0.08 | 0.70~1.20 | 0.50~1.00 | 0.20~0.60 | – | 65~72 (Barrel) / 35~55 (Neck) | ||
| Nickel – chromium – molybdenum infinite chilled Ⅱ | IC II | 2.90~3.60 | 0.60~1.20 | 0.40~1.20 | ≤0.25 | ≤0.08 | 0.70~1.20 | 1.01~2.00 | 0.20~0.60 | – | 65~72 (Barrel) / 35~55 (Neck) | ||
| Nickel – chromium – molybdenum infinite chilled Ⅲ | IC III | 2.90~3.60 | 0.60~1.20 | 0.40~1.20 | ≤0.25 | ≤0.08 | 0.70~1.20 | 2.01~3.00 | 0.20~0.60 | – | 65~80 (Barrel) / 32~45 (Neck) | ||
| High – nickel chromium – molybdenum infinite chilled Ⅳ | IC IV | 2.90~3.60 | 0.60~1.20 | 0.40~1.20 | ≤0.10 | ≤0.05 | 1.00~3.00 | 3.01~5.00 | 0.20~1.00 | – | 70~83 (Barrel) / 32~45 (Neck) | Hot strip/plate mill work rolls, flat work rolls, coiler work rolls | |
| High – nickel chromium – molybdenum infinite chilled Ⅴ | IC V | 2.90~3.60 | 0.60~2.00 | 0.40~1.20 | ≤0.10 | ≤0.05 | 1.00~3.00 | 3.01~5.00 | 0.20~2.00 | 0.20~2.50 | 72~85 (Barrel) / 35~45 (Neck) |
Material Characteristics
- Structure: A mix of carbide and fine graphite in a pearlitic or bainitic matrix.
- Hardness: The surface hardness generally ranges from 55 to 75 HSC, depending on the application.
- Performance: The presence of graphite improves thermal crack resistance and offers self-lubricating properties, while the chilled surface ensures high wear resistance.
Applications
These Rolls are widely used in:
- Hot strip mills (finishing stands)
- Bar and rod mills
- Section mills
- Roughing and finishing stands of medium and light section mills
- Certain plate mills
Advantages
- Balanced wear resistance and toughness
- Reduced spalling risk compared to standard chilled iron rolls
- Extended roll life with stable performance
- Improved surface finish on rolled products
- Cost-effective solution for mills seeking a balance between durability and performance
With their unique blend of hardness, toughness, and thermal resistance, Indefinite Chill Cast Iron Rolls are an ideal choice for a wide range of rolling mill applications.
Contact Us
SATRAD GROUP offers high-performance roll solutions for steel rolling operations. If your mill operation demands reliability, cost efficiency, and consistent quality, our team at SATRAD GROUP is ready to provide tailored roll solutions to meet your needs.
