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Alloy Steel Base

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Adamite Rolls

These are High Carbon, Alloy Steel Rolls which are given special multi-stage heat-treatment in order to develop the combination of hardness, toughness and wear resistance. The structure produced consists of well broken up and dispersed carbides in matrix of bainite and pearlite.The high carbide content and tough, hard matrix make these rolls suitable for section rolling.

Application

Small, Medium and Heavy Section Mills, Plate, Strip and Tube Mills.


Chemical Composition

Hardness C Mn Si Cr Ni Mo S P UTS Kgf/mm.sq
40-45 1.50-2.00 0.60-0.90 0.30-0.80 1.00-1.50 0.90-1.20 0.30-0.40 0.06 Max 0.06 Max -
45-50 1.50-2.00 0.60-0.90 0.30-0.80 1.00-1.50 0.90-1.20 0.30-0.40 0.06 Max 0.06 Max 55-75
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Alloy Cast Steel Rolls

These rolls are hypo-eutectoid steel rolls alloyed with Chromium and Molybdenum. The heat treatment ot these rolls involves normal double annealing followed by tempering cycle which improves toughness and thermal shock resistance The microstructure is primarily pearlitic with broken cementite. These types of Rolls offer mechanical strength of higher degree with good weldability.

Application

These rolls are ideally made for Blooming mills and Roughing Stands for Light and Heavy Section Mills.


Chemical Composition

Hardness C Mn Si Cr Ni Mo S P UTS Kgf/mm.sq
35-45 1.40-1.70 0.60-0.90 0.30-0.80 0.80-1.10 0.50-1.6 0.20-0.30 0.006 Max 0.006 Max 70-75

Heat treatment

Heat treatment is one of the key factor in the final physical and mechanical properties of rolls.

Heat treatment processes including annealing and tempering, stress relieving quenching and forced cooling, are applied to achieve the maximum benefits from the rolls.

Heat treatment mechanical properties of rolls
Heat treatment mechanical properties of rolls