Pearlitic S.G. Iron (HS-60/65) with some
carbides and graphite nodules.
Magnification : 500X
Bainitic S.G. (HS-70/75)
Magnification : 500X
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S.G. Iron Rolls
S.G. Iron or ductile iron is considered as one of the most versatile roll material now days. It is produced by a small proposition of magnesium added to the melt as nickel-magnesium or alternative alloy, or pure magnesium. In S.G. Iron Rolls, the free carbon takes the shape of spheroids or nodules, thereby eliminating the notch effect to flake graphite and improving upon the mechanical properties of cast iron.
These Rolls are available in a wide range of hardness & composition for a variety of application. The matrix structure varies from Ferrito-Pearlitic, Pearlitic to Bainitic & Martensitic together with different carbide contents and graphite in the from of spheroids/nodules. Some critical grades are heat treated for higher strength. Chemical composition and structure are chosen to suit specific application.
Application : Roughing and intermediate rolls for slabbing and blooming mills. Roughing, intermediate and finishing for rail and structural mills. Finishing for wire rod and narrow strip mills.
S.G. Iron Rolls
Chemical Composition
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