TMT bars

Thermo Mechanically Treated (TMT) steel bars are known as the new generation steel owing to their high strengths obtained exclusively in this method of steelmaking. TMT steel is manufactured by heating raw material at 1200^0c initially, after which it is austenitized. Then, the bars undergo a process called quenching which allows rapid cooling and conversion into martensite, the high strength structure of steel.

During Thermo Mechanical Treatment, the steel bars are made to pass through a specially-designed water cooling system. The bars are cooled in water for a specific period of time such that the surface is colder than the inner core that remains hot. This makes the heat flow from the inner core to outer surface, causing tempering. This additional tempering of steel bars helps to impart a higher strength to the steel thus treated.