WHAT IS TMT BAR?
Thermo-Mechanically Treated Bars, (TMT Bars), are Extra HighStrength Reinforcing bars which replacing any form of cold twisting, the technology of yesteryears. In this process, the steel tmt bars receive a short, intensive cooling as they pass through the specially resigned Tempcore Water Cooling System after the last Rolling Mill Stand. The sudden quenching converts the surface layer of the steel bar to a hardened structure. This phase of intensive cooling by the Tempcore System is followed by further cooling in atmosphere, so that the temperature between the core (which is steel hot) and the cooled surface layer is equalized, and the surface layer gets tempered by the heat from the core. The resulting structure is a tempered martensite zone at the periphery and a fine grain ferrite pearlite structure in the central zone.