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 Characteristics : Spheroidal Graphite Iron Rolls are structurally characterized as having graphite in nodular form instead of being in flakes as characterized in normal Cast Iron Rolls. The matrix structure varies from Ferrito-Pearlitic and Pearlitic together with different carbide content and graphite in the form of spheroid / nodules.

Applications : These rolls are suitable for Roughing and Intermediate Mill stands of Blooming/Slabbing, TMT Bars Mills and Wire Rod mills. Rolls for Intermediate and Finishing Stands of Structure and Strip Mills.

• Common Grades:
• SG P 47 (45°-50° Sh C)
• SG P 53 (50°-55° Sh C)
• SG P 57 (55°-60° Sh C)
• SG P 63 (60°-65° Sh C)

• Mechanical Properties:
• Tensile Strength :400-600 N/mm2
• Bending Strength: 2-4 J/cm2

Characteristics : Alloy Steel Base Adamite Rolls are Hyper-eutectoid Steel alloyed with Nickel, Chromium and Molybdenum with higher Carbon content, ranging from 0.80% to 2.00%. Vanadium is also added to achieve the desired microstructure. It has higher mechanical strength and thermal/wear resistance. The rolls undergo a multi-stage, high temperature heat treatment cycle which consists of Normalizing/Hardening followed by a tempering cycle. This gives the rolls a combination of hardness, toughness and wear resistance required for a particular application. The microstructure consists of fine pearlitic matrix with spheroidized carbide.

Applications : These rolls are suitable for Roughing, Intermediate and Finishing stands for Section and Structural Mills. Applications include Heavy Section and Rail Mills, Universal Beam Mills, TMT Bar Mills, Medium Section Mills and Billet Mills.

• Common Grades:
• ADM 37 (35°-40° Sh C)
• ADM 42 (40°-45° Sh C)
• ADM 47 (45°-50° Sh C)
• ADM 50 (48°-52° Sh C)

• Mechanical Properties:
• Tensile Strength : 600-700 N/mm2
• Bending Strength: 3-8 J/cm2

Characteristics : Carbon content in Alloy Cast Steel Rolls is in the range of 0.50% to 0.80%. These Hypo-eutectoid steel rolls are alloyed with Chromium and Molybdenum. The heat treatment of these rolls involve double annealing cycles followed by tempering. This helps to improve toughness and thermal shock resistance. The microstructure is primarily fine pearlitic with broken/spheroidized cementite. These rolls have high mechanical strength with good weldability.

Applications : These rolls are ideally suited for Blooming Mills and Roughing Stands for Light and Heavy Section Mills.

• Common Grades:
• ACS 33 (30°-35° Sh C)
• ACS 37 (35°-40° Sh C)

• Mechanical Properties:
• Tensile Strength : 700-800 N/mm2
• Bending Strength: 3-6 J/cm2

Characteristics : Alloyed Indefinite Chill Rolls (AIC) have a matrix structure which varies from fine pearlitic to bainitic martensitic depending on the alloy addition. The desired hardness is achieved by changing the carbide to graphite balance with the help of the chemical composition. The presence of flake graphite makes the material resistant to fire cracking, spalling/chip-off and wear. Also, due to alloy addition, these rolls have a much better hardness penetration than clear chill and other cast iron rolls. Alloyed Indefinite Chill Rolls (AIC) are highly suitable for products where surface finish is very critical. Adequate water cooling of roll is required. Wide range of hardness/composition for a variety of applications is available to suit a particular mill stand.

Applications : Intermediate/Finishing stand of Wire Rod Mills, TMT Mills, Merchant Mills and Structural Mills. Finishing stand of Strip, Sheet and Flat rolling mills.

• Common Grades:
• AIC 57 (55°-60° Sh C)
• AIC 63 (60°-65° Sh C)
• AIC 67 (65°-70° Sh C)
• AIC 73 (70°-75° Sh C)
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• Special Grades:
• SPIC (70°-80° Sh C)
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• Mechanical Properties:
• Tensile Strength :200-300 N/mm 2
• Bending Strength: 1-1.8 J/cm 2

These Metal Rolls have hard alloy iron on the working layer and the core is either made of soft grey iron or nodular iron as application demands. The matrix generally is bainitic with equal distribution of carbides and graphite on the shell.

Due to the Nodular core and highly alloyed surface these Rolls have excellent mechanical properties, strength, high wear resistance, good surface finish and resistance to shock/thermal/mechanical loads. These Rolls are produced by spin and static cast together

Product Applications :

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• Wire rod finishing rolling.
• Flat products rolling in Hot strip and Plate Mills.
• Cold rolling of non-ferrous sheets.

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Size Limitation :

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• Maximum : 600 mm diameter
• Minimum  : 150 mm diameter