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Alloy Steel Base (Adamite) Rolls

Alloy Steel Base (Adamite) Rolls are Hyper-eutectoid steel rolls having higher carbon content, ranging from 1.0% to 2.0%. and alloyed with Nickel, Chromium and Molybdenum. The addition of Cr, Ni, Mo and other elements and a multi stage heat treatment process (Annealing) followed by tempering cycle develops a high wear and fire cracking resistance together with a constant hardness along the working layer. The microstructure consists of fine pearlitic matrix with spheroidized carbide. A unique characteristic of these rolls is that they have uniform hardness from the surface to the core.


  • Roughing stands for TMT Bar, Wire Rod and Hot Strip Mills
  • Roughing, Intermediate and Finishing stands for Section and Structural Mills
  • Rail Mills, Universal Beam Mills, and Billet Mills.


  • AD-42 (40-45 Shore C)
  • AD-47 (45-50 Shore C)

Mechanical Properties

  • Tensile Strength: 500-700 Kg/mm²
  • Bending Strength: 750-1000 Kg/mm²
Chemical Composition
Grade Hardness
(Shore C)
C% Mn% Si% S% P% Cr% Ni% Mo%
AD-42 40-45 1.4-1.6 0.5-0.8 0.4-0.7 0.05 Max 0.05 Max 0.8-1.2 0.4-0.8 0.2-0.4
AD-47 45-50 1.6-1.9 0.6-1.0 0.4-0.7 0.05 Max 0.05 Max 1.0-1.5 0.8-1.2 0.2-0.5
AD-52 50-55 1.6-2.1 0.7-1.0 0.3-0.7 0.05 Max 0.05 Max 1.1-1.6 1.0-1.5 0.2-0.5