Chilled Cast Iron Roll
Avail this product from Tinvo as there is no free graphite in the working layer of alloy chilled cast iron roll.
Indefinite Chilled Cast Iron (ICCI) rolls, also known as ICDP rolls, feature a microstructure where graphite flakes are distributed throughout the working layer. Unlike standard chilled rolls, ICCI rolls have no distinct ‘chill line’ between the shell and the core, which is the key to their superior performance.
Introduction
There is no free graphite in the working layer of alloy chilled cast iron roll, it is featured as high hardness, good wear resistance, and micro metallographic micro-structure is fine pearlite and carbides.
Mastery of Chill Depth
Precision Hardness: We maintain strict control over the chill depth (hardened layer) to ensure consistency throughout the roll’s service life. This allows for multiple re-grinds while maintaining the required surface hardness (HSD 60-80)
Exceptional Surface Finish
Mirror-Like Performance: Due to the high density of iron carbides in the chilled layer, our rolls can be polished to an exceptional finish, making them ideal for industries where surface precision is critical, such as paper calendering and metal foil rolling.
Dual-Phase Structure
The ‘Hard Shell, Soft Heart’ Design: The rapid cooling creates a wear-resistant cementite-rich shell, while the slower-cooled core remains grey iron, providing the fracture toughness needed to withstand operational stresses.
Indefinite Chilled (ICDP) Rolls — How They Differ
Superior Anti-Spalling Performance: TINVO’s ICCI rolls are engineered with a unique graded microstructure. Since there is no distinct “chill line” between the working layer and the core, the internal thermal stresses are significantly minimized. This drastically reduces the risk of surface spalling and catastrophic roll failure under high-load conditions.
Minimal Hardness Drop: Our Indefinite Chilled Cast Iron rolls feature an optimized alloy distribution. This ensures that the surface hardness remains consistent throughout the entire service life of the roll, allowing for multiple re-grinds without compromising wear resistance.
Excellent Thermal Crack Resistance: The presence of fine, evenly distributed graphite flakes acts as a natural lubricant and thermal buffer. This characteristic provides the rolls with exceptional resistance to thermal fatigue and “fire-cracking” during rapid heating and cooling cycles in hot rolling stands.
Premium Surface Quality: The sophisticated metallurgical bond between the carbides and the matrix allows for a mirror-like finish after grinding. This ensures that the rolled steel products (strip, bar, or plate) maintain a high-quality surface with minimal imperfections.
As a specialized class within the Chilled Iron Roll family, ICDP / Indefinite Chilled Cast Iron rolls share the high-carbide work layer concept with standard chilled cast iron rolls, but differ in microstructure: the absence of a distinct chill line gives ICDP its characteristic graded transition from work layer to core. For mills comparing the two families in the context of stand selection, see the standard chilled cast iron roll family page for the broader chilled iron roll classification.
Application
The main application of the cast iron rolls are work roll of bar & wire rod mill, hot strip mill, cold strip mill, PC mill, section mill, plate rolling mill, non-ferrous mill, pre-finishing stands of high speed wire, stretch reducing mill for seamless steel tube, etc.
Need higher wear resistance for late finishing stands? Check our HSS Rolls.
Looking for roughing mill solutions? View our Adamite Rolls.
- For high-speed finishing stands requiring maximum wear resistance, explore our High NiCr ICDP Rolls.
Chemical Composition
| Roll | C | Si | Mn | P | S | Ni | Cr | Mo |
| Ni-Cr-Mo chilled iron roll(I) | 3.20~3.70 | 0.40~0.80 | 0.20~0.50 | ≤0.40 | ≤0.10 | 0.50~1.00 | 0.20~0.60 | 0.20~0.60 |
| Ni-Cr-Mo chilled iron roll(II) | 3.20~3.70 | 0.40~0.80 | 0.20~0.50 | ≤0.40 | ≤0.10 | 1.01~2.00 | 0.30~1.20 | 0.20~0.60 |
| Ni-Cr-Mo chilled iron roll(III) | 3.20~3.70 | 0.40~0.80 | 0.20~0.50 | ≤0.40 | ≤0.10 | 2.01~3.00 | 0.50~1.50 | 0.20~0.60 |
Indefinite Chilled Cast Iron Roll
| Roll | C | Si | Mn | P | S | Ni | Cr | Mo |
| Cr-Mo infinite chilled cast iron roll | 3.20~3.70 | 0.80`1.20 | 0.60~1.00 | ≤0.20 | ≤0.10 | / | 0.60~1.20 | 0.20~0.60 |
| Ni-Cr-Mo infinite chilled cast iron roll（I） | 3.20~3.70 | 0.80`1.20 | 0.60~1.00 | ≤0.20 | ≤0.10 | 0.50~1.00 | 0.70~1.20 | 0.20~0.60 |
| Ni-Cr-Mo infinite chilled cast iron roll（II） | 3.20~3.70 | 0.60~1.00 | 0.60~1.00 | ≤0.20 | ≤0.10 | 1.01~2.00 | 0.70~1.20 | 0.20~0.60 |
| Ni-Cr-Mo infinite chilled cast iron roll（III） | 3.20~3.70 | 0.60~1.00 | 0.60~1.00 | ≤0.20 | ≤0.10 | 2.01~3.00 | 0.70~1.20 | 0.20~0.6 |
Physical Properties
| Roll | Roll-body hardness | Roll-neck hardness | Tensile strength | Chill depth | |||
| Section steel | |||||||
| Ni-Cr-Mo chilled iron roll(I) | 60~70 | 32~50 | ＞150 | ＜Φ200 | Φ201~250 | Φ251~300 | ＞Φ300 |
| Ni-Cr-Mo chilled iron roll(II) | 62~75 | 35~52 | ＞150 | 12~25 | 15~30 | 17~35 | 20~45 |
| Ni-Cr-Mo chilled iron roll(III) | 65~80 | 40~55 | ＞150 | 12~25 | 15~30 | 17~35 | 20~45 |
Indefinite Chilled Cast Iron Roll
| Roll | Roll-body hardness HSD | Roll-neck hardness HSD | Tensile strength Mpa |
| Cr-Mo infinite chilled cast iron roll | 55~70 | 35~55 | ＞160 |
| Ni-Cr-Mo infinite chilled cast iron roll（I） | 60~72 | 35~55 | ＞160 |
| Ni-Cr-Mo infinite chilled cast iron roll（II） | 62~72 | 35~55 | ＞160 |
| Ni-Cr-Mo infinite chilled cast iron roll（III） | 65~75 | 35~55 | ＞160 |
Metallographic Structure
| Roll | Metallographic structure |
| Ni-Cr-Mo chilled iron roll(I) | Pearlite + cementite + lai type body |
| Ni-Cr-Mo chilled iron roll(II ) | Fine pearlite + cementite + lai type body |
| Ni-Cr-Mo chilled iron roll(III ) | Type body + cementite + lai type body |
Indefinite Chilled Cast Iron Roll
| Roll | Metallurgical structure |
| Cr-Mo infinite chilled cast iron roll | Pearlite + cementite + a little graphite |
| Ni-Cr-Mo infinite chilled cast iron roll（I） | Pearlite + cementite + a little graphite |
| Ni-Cr-Mo infinite chilled cast iron roll（II） | Fine pearlite + cementite + a small amount of graphite |
| Ni-Cr-Mo infinite chilled cast iron roll（III） | Type body + cementite + a small amount of graphite |
Customization
Leave your RFQ and provide the drawings, chemical composition, hardness, physical properties, etc.
Versatile Industrial Applications: Beyond steel mill stands, TINVO’s chilled rolls are widely trusted in food processing (flour, oilseed) and polymer compounding.