Indefinite Chilled
Indefinite Chilled Cast Iron rolls are characterized by a carbide-rich matrix combined with a controlled distribution of flake graphite. This balanced microstructure provides high surface hardness while maintaining sufficient toughness to withstand mechanical and thermal stresses during rolling operations.
The presence of flake graphite improves resistance to chipping and fire-cracking by reducing stress concentration and absorbing thermal shocks. As a result, these rolls offer reliable durability along with excellent surface finish quality.
| HS Range | C | Mn | Si | Ni | Cr | Mo | UTS Kgf/mm² | |
|---|---|---|---|---|---|---|---|---|
|
50 – 60 |
Min |
3.0 |
0.6 |
1.0 |
1.5 |
0.7 |
0.2 |
35 |
|
|
Max |
3.5 |
0.9 |
1.5 |
2.0 |
1.2 |
0.4 |
45 |
|
60 – 70 |
Min |
3.0 |
0.6 |
1.0 |
1.5 |
0.8 |
0.2 |
35 |
|
|
Max |
3.5 |
0.9 |
1.5 |
2.5 |
1.2 |
0.4 |
45 |
|
70 – 80 |
min |
3.1 |
0.6 |
0.9 |
1.5 |
0.8 |
0.2 |
35 |
|
|
Max |
3.6 |
0.9 |
1.5 |
2.5 |
1.2 |
0.4 |
45 |
Double Poured Chilled
Double Poured Indefinite Chilled (DPIC) rolls are manufactured using a dual-pouring process that creates a distinct metallurgical bond between a hard, wear-resistant outer shell and a tougher grey iron core. This gradual transition in structure ensures both high surface hardness and strong internal support.
The outer working layer is carbide-rich with a controlled amount of graphite, positioned between white and grey iron characteristics. As hardness reduces progressively toward the center of the roll, the core provides enhanced strength and shock resistance.
| HS Range | C | Mn | Si | Ni | Cr | Mo | UTS Kgf/mm² | |
|---|---|---|---|---|---|---|---|---|
|
70 – 75 |
Min |
3.1 |
0.6 |
0.7 |
2.2 |
1.2 |
0.2 |
38 |
|
|
Max |
3.6 |
0.9 |
1.1 |
3.0 |
1.6 |
0.4 |
43 |
|
75 – 80 |
Min |
3.1 |
0.6 |
0.7 |
2.2 |
1.2 |
0.2 |
38 |
|
|
Max |
3.6 |
0.9 |
1.1 |
3.0 |
1.8 |
0.4 |
43 |
|
80 – 85 |
min |
3.2 |
0.6 |
0.7 |
2.5 |
1.3 |
0.2 |
38 |
|
|
Max |
3.6 |
0.9 |
1.0 |
3.5 |
1.9 |
0.4 |
43 |
Indefinite Chilled Double Poured (ICDP)
Indefinite Chilled Double Poured (ICDP) rolls are specially developed for high-performance hot strip mills and demanding finishing applications. Manufactured using a double-pouring process, these rolls feature a hard, wear-resistant outer shell metallurgically bonded to a tough core, ensuring both durability and structural stability.
The working layer consists of M3C-type eutectic carbides and free graphite uniformly distributed within a tempered bainitic–martensitic matrix. This optimized microstructure delivers excellent wear resistance, strong protection against thermal fatigue, and enhanced resistance to mill incidents.
ICDP-Enhanced Carbide
ICDP-Enhanced Carbide (ICDP-EC) rolls are developed to deliver superior wear resistance and consistent surface finish through a precisely controlled microstructure. The working layer is reinforced with finely distributed, high-hardness carbides that enhance durability throughout the roll’s service life.
The microstructure consists of a balanced combination of primary M3C carbides and graphite embedded within a fine-tempered martensitic and bainitic matrix. The addition of niobium carbides further strengthens the structure by refining carbide distribution and increasing resistance to abrasion and crack propagation.
Controlled spherical graphite morphology ensures uniform dispersion across the working layer, reducing differential wear and improving resistance to thermal fatigue. This optimized design makes ICDP-EC rolls highly reliable for demanding rolling environments.
| Material | HS Range | C | Mn | Si | Ni | Cr | Mo | V | W | Nb | UTS Kgf/mm² | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
ICDP
|
70 – 83
|
Min |
3 |
0.6 |
0.8 |
4 |
1.3 |
0.2 |
|
|
|
41 |
|
|
|
Max |
3.6 |
1.3 |
1.2 |
4.9 |
2 |
0.5 |
|
|
|
45 |
|
ICDP-CE |
75 – 85 |
Min |
3.2 |
1 |
0.7 |
1.5 |
4 |
0.2 |
0.1 |
|
|
41 |
|
|
|
Max |
3.6 |
1.7 |
1.5 |
3 |
6 |
3 |
3 |
1 |
1 |
45 |
Core Materials
The core of a roll plays a critical role in maintaining structural integrity, load-bearing strength, and resistance to thermal and mechanical stresses during rolling operations. While the outer shell is designed for wear resistance, the core material ensures shock absorption and overall roll stability.
Our core materials are carefully engineered to provide the optimal balance between strength, toughness, and hardness compatibility with the working layer. Controlled graphite morphology and alloy composition ensure uniform mechanical properties and reliable performance under demanding mill conditions.
| Material | HS Range | C | Mn | Si | Ni | Cr | Mo | UTS Kgf/mm² | |
|---|---|---|---|---|---|---|---|---|---|
|
Lamellar Core |
36 – 44
|
Min |
2.5 |
0.4 |
1.2 |
0.2 |
0.3 |
0.1 |
18 |
|
|
|
Max |
3.4 |
1.0 |
2.9 |
2.0 |
1.3 |
0.3 |
20 |
|
Nodular Core |
36 – 44 |
Min |
2.6 |
0.3 |
2.0 |
0.0 |
0.0 |
0.0 |
36 |
|
|
|
Max |
3.5 |
1.1 |
3.0 |
1.5 |
0.6 |
0.3 |
40 |