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.
Applications
- 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.
Grades
- 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 |