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Spheroidal Graphite Iron Rolls |
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Spheroidal Graphite Cast Iron (SG Iron) or ductile iron is considered as one of the most versatile roll material now a days. Rolls has greatly improved properties, including high tensile strength of more then 40kg/mm2 compared to that of 20-30 kg/mm2 of cast iron. These are specifically good for small section and flat rolling. These rolls are most suitable for heavier section where added strength and depth of hardness are required. Stand-Cast acicular S.G. iron is employed for certain special-purpose rolls. eg. pilger rolls.
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