TMT Rebar Rolling Mill

Thermo Mechanical Treatment (TMT) Rebar Rolling Mill

The C-20 Billets from CCM is directly charged to the High UTS Quenching and Self-Tempering (HUQST) Rolling Mill where it is reduced to Thermo Mechanical Treatment (TMT) Rebars at 1050 degree Celsius.


The hot rolled Thermo Mechanical Treatment (TMT) Rebars are rapidly cooled with RO water through special spray nozzles. This hardens the outer layer of the rebars and helps in the formation of Martensite rim while the core remains hot.

Cross section of Maithan TMT 600


After the rebars leave the quenching station, heat transfers from the hot core to the surface, tempering the outer Martensite rim into Tempered Martensite; an intermediate ring of Martensite and Bainite is also formed.


The Thermo Mechanical Treatment (TMT) Rebars are cooled slowly on automatic cooling beds, where the core is transferred into a ductile Ferrite - Pearlite structure. The stronger surface with a ductile core gives Maithan Thermo Mechanical Treatment (TMT) 600 its unique characteristic.