Alloyed Steel

Alloy Steel Base

Alloyed Steel rolls are manufactured to achieve a balanced combination of strength, toughness, and wear resistance required for heavy-duty rolling mill operations. The microstructure typically consists of ferrite and pearlite, with bainitic transformation in higher carbon grades. This controlled metallurgical structure ensures uniform hardness penetration across the working depth without significant hardness reduction.

The addition of alloying elements such as Chromium (Cr), Nickel (Ni), and Molybdenum (Mo) improves hardenability, enhances wear resistance, and increases resistance to thermal fatigue. These rolls demonstrate excellent mechanical stability under high rolling loads and severe thermal cycling conditions.

Alloyed Steel rolls are primarily used in breakdown, roughing, and intermediate stands for rolling blooms, billets, heavy sections, and structural profiles. Their structural integrity and deep hardness penetration make them suitable for demanding mill environments.

Graphitic Steel

Alloyed Steel rolls are manufactured to achieve a balanced combination of strength, toughness, and wear resistance required for heavy-duty rolling mill operations. The microstructure typically consists of ferrite and pearlite, with bainitic transformation in higher carbon grades. This controlled metallurgical structure ensures uniform hardness penetration across the working depth without significant hardness reduction.

The addition of alloying elements such as Chromium (Cr), Nickel (Ni), and Molybdenum (Mo) improves hardenability, enhances wear resistance, and increases resistance to thermal fatigue. These rolls demonstrate excellent mechanical stability under high rolling loads and severe thermal cycling conditions.

Alloyed Steel rolls are primarily used in breakdown, roughing, and intermediate stands for rolling blooms, billets, heavy sections, and structural profiles. Their structural integrity and deep hardness penetration make them suitable for demanding mill environments.

High-Speed Steel (HSS)

High-Speed Steel (HSS) rolls are manufactured using a high-alloy, high-carbon outer shell metallurgically bonded to a nodular iron core. This composite structure combines exceptional surface hardness with superior core strength, ensuring reliability under heavy rolling loads.

The microstructure of HSS consists of a tempered martensitic matrix enriched with finely distributed MC, M2C, and M6C carbides. These hard carbide phases significantly enhance wear resistance and maintain hardness even at elevated operating temperatures.