High Chromium rolls are characterized by the presence of well distributed ternary carbides of M7C3 type in the shell area which remain well distributed in a tempered upper Bainitic and Martensitic matrix. These rolls are customized as per the specific rolling mill conditions of the user.
Chemical CompositionProximate Chemical Composition [ in %- wt ]
High compressive strength – To increase the load bearing capacity
High thermal fatigue strength – To reduce crack initiation
Higher peeling resistance of the oxide layer-To reduce rolled in scale and other such rolling defects
High wear resistance - To get a higher campaign life
Barrel Dia (mm)
Barrel Length (mm)
Total Length (mm)
Hi -Cr Iron
570 - 1200
Composite High Chromium Iron rolls are normally used in the initial stands (F1 to F3 and at times F4) of Hot Strip Mills where the stock undergoes the maximum reduction. These centrifugally cast rolls have a high chromium content shell with a nodular iron core. Though there are a few other areas of application for these rolls like skin pass rolls in Cold Rolling Mills and initial stands of tandem mill these applications are very limited in nature.