Thermo machanically treated steel known as a TMT steel can be introduce as a new-generation-high-strength steel having superior properties such as superior weld ability, high Strength with ductility and bend ability meeting highest quality standards, at internatinal level. under thermo mechanical treatment (TMT) of bars, the steel bars are made of pass through a specially designed water cooling System where these are kept for such a period that outer surface of bars becomes colder while the core remains horghis creates a temperature gradient in the bars. When the bars are taken out of the cooling system, the heat flows from the core to the outer surface causing further tempering of steel bars ttereby helping them in attaining higher yield strength without minimizing ductility.
To decide the percentage of carbon content in steel has been a major challenge for the Engineers. While certain minimum carbon content in steel is essential to achive the required strength, an excess of carbon content threatens its property of weld ability. In TMT bars, this problem has been eliminated. In these bars, the carbon content restricted to 0.24% to attain weld ability and at the same time no strength is lost on this account. The joints can be welded by ordinary electrodes and no extra precautions are required.
Another advantage of TMT bars is their tough surface providing high yield strength and a soft core providing excvellent ductility. Strength, weld ability and ductility are such properties which declare TMT steel highly economical and safe for use.