## ACICULAR NODULAR CAST IRON ROLLS (SGA)

Acicular spheroid graphite cast iron roll is made by adding Ni, Cr, Mo to the cast iron, which changes the matrix into an acicular microstructure. This process enhances the properties of the cast iron, making it stronger, tougher, and more wear-resistant than other types of rolls such as Spheroid Graphite Pearlitic Roll (SGP).

The acicular microstructure of the roll ensures that it can withstand high pressure, high speeds and heavy loads without deforming or cracking. This is particularly useful in industrial applications such as steelmaking, where the roll is exposed to high temperatures and severe working conditions.

CHEMICAL COMPOSITION
MATERIAL | C% | SI% | MN% | CR% | NI% | MO% | MG%
--- | --- | --- | --- | --- | --- | --- | ---
SGA I | 2.90-3.60 | 1.40-2.20 | 0.40-1.00 | 0.10-0.60 | 2.00-3.00 | 0.70-1.00 | ≥0.04
SGA II | 2.90-3.60 | 1.20-2.00 | 0.40-1.00 | 0.20-1.00 | 2.00-3.50 | 0.80-1.10 | ≥0.04
SGA III | 2.90-3.60 | 1.00-2.00 | 0.40-1.00 | 0.20-1.20 | 2.00-4.50 | 0.80-1.10 | ≥0.04

Physical Composition
Material code | Barrel Hardness (HSC) | Neck Hardness (HSC) | Tensile strength (Mpa)
--- | --- | --- | ---
SGA I | 60-65 | 35-55 | >450
SGA II | 65-70 | 35-55 | >450
SGA III | 70-75 | 35-55 | >450

## Contact Us

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Ghaziabad - 201009 (U.P.), India.
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