Material Grade: IC I , IC II, IC III, IC IV, IC V

Hot Strip, Section & Skin Pass Mill Ni-Cr-Mo Indefinite Chilled Cast Iron Rolls (IC rolls)

Engineered for exceptional wear resistance and thermal stability, DURON’s Indefinite Chilled Rolls (IC Series) utilize a precisely alloyed Nickel-Chromium-Molybdenum (Ni-Cr-Mo) matrix. We carefully balance carbide-forming elements (Chromium, Molybdenum) with graphitizing dynamics to control the chill depth and graphite morphology. This structural control makes these indefinite chilled rolls the optimal solution for hot strip, section, and skin pass mills.
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Ni-Cr-Mo indefinite chilled cast iron roll with fine graphite distribution

By Material

By Application

By Tooling

Key Mill Applications (Recommended Stands)

Small Section & Narrow Strip Mills

Recommended Grades : IC I, IC II, IC III

For these mills, we provide a tiered solution. While IC I-II offers effective bite friction and cost-efficiency, the IC III centrifugal composite rolls are specifically recommended for higher-load stands to help reduce roll change frequency and maintain pass profile stability.

Continuous Bar & High-Speed Wire Rod

Recommended Grades : IC III, IC IV

Engineered for intermediate and pre-finishing stands. The centrifugal cast structure provides the necessary core toughness and shell wear resistance to withstand the high rolling speeds and thermal cycling typical of modern wire rod lines.

Hot Strip & Medium Plate Mills

Recommended Grades : IC IV, IC V

These highly alloyed centrifugal grades are developed for finishing stands. They offer substantial resistance to thermal cracking and spalling, supporting the consistent surface finish required for strip and plate production.

Chemical Composition & Physical Properties

Engineered for exceptional wear resistance and thermal stability, DURON’s Ni-Cr-Mo Indefinite Chilled Rolls (IC rolls) utilize a precisely alloyed Nickel-Chromium-Molybdenum (Ni-Cr-Mo) matrix. We carefully balance carbide-forming elements (Chromium, Molybdenum) with graphitizing dynamics to control the chill depth and graphite morphology. This structural control makes these indefinite chilled rolls the optimal solution for hot strip, section, and skin pass mills.

Code (代码) C Si Mn P S Cr Ni Mo Hardness (HSD) Tensile (N/mm²)
IC I 2.90-3.60 0.60-1.20 0.40-1.20 ≤ 0.25 ≤ 0.08 0.70-1.20 0.05-1.00 0.20-0.60 55-72 ≥ 160
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 55-72
IC III 2.90-3.60 0.60-1.20 0.40-1.20 ≤ 0.25 ≤ 0.05 0.70-1.20 2.01-3.00 0.20-1.00 65-78 ≥ 350
IC IV 2.90-3.60 0.60-1.50 0.40-1.20 ≤ 0.10 ≤ 0.05 1.00-2.00 3.01-4.80 0.20-1.00 70-83
IC V 2.90-3.60 0.60-1.50 0.40-1.20 ≤ 0.10 ≤ 0.05 1.00-2.00 3.01-4.80 0.20-2.00 77-85

* Premium Grade Note: The IC V grade is further fortified with advanced micro-alloying elements specifically for demanding hot strip mill applications: Vanadium (V) 0.20~2.00%, Tungsten (W) 0.00~2.00%, and Niobium (Nb) 0.00~2.00%.

Metallurgical Excellence

Why Choose DURON Indefinite Chilled Rolls for Section & Strip Mills?

    • Refined Alloy Matrix: The strategic combination of Nickel, Chromium, and Molybdenum creates a working layer filled with iron and alloy carbides. This specific microstructure ensures our indefinite chilled rolls maintain excellent hardness and surface stability during continuous campaigns.

    • Optimal Thermal Crack Resistance: Thanks to the controlled presence of fine, discontinuous graphite flakes, these indefinite chilled rolls act as excellent thermal shock absorbers, effectively arresting microscopic heat cracks before they propagate.

    • Superior Dynamic Performance: The metallurgical fusion between the high-alloy wear layer and the tough core ensures maximum resistance to structural breakage, guaranteeing high uptime in demanding hot rolling applications.

    Rolling Train Layout Note: To optimize performance across your entire line, we recommend pairing our IC series rolls with DURON Adamite Rolls for heavy-reduction roughing stands and premium High-Speed Steel Rolls for high-speed finishing stands.

Manufacturing Control & Inspection

100% Non-Destructive Testing

Every roll undergoes rigorous Ultrasonic Testing (UT) at the working layer and bonding zone to eliminate internal voids and ensure structural integrity under heavy loads.

Precision CNC Machining

Roll necks and barrel profiles are machined using heavy-duty CNC equipment, strictly adhering to your drawing's dimensional and runout tolerances for perfect bearing fitment.

Metallurgical Verification

Chemical compositions are analyzed via spectrometer pre-pouring, and multi-point hardness mapping is conducted post-heat treatment to guarantee the specified hardness gradient.

Quality Traceability

All dispatched rolls are accompanied by a comprehensive inspection certificate, documenting chemical composition, hardness distribution, and UT reports.

See Full Quality Control Process

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