Steel Varieties

 

According to TMT Steel Bars Manufacturers: To understand the TMT steel bar better, you need to know the other three steel types and their application.

  Mild steel bar: Mild steel bars have a low tensile strength and are used in the fabrication and allowing of steel structures used in construction work. They have a low carbon and silicon content and have a lower tensile strength than others. Their surface is flat, and the round part has a diameter ranging from 6 to 50mm. They bend easily, allowing workers to cut the rod into pieces without causing damage.

Deformed steel bars have normal ductility and are used in residential, commercial, and infrastructure applications. The most common size of such steel bar is 9m to 12m. The diameter of this bar varies depending on its weight. The surface of the bar has lugs, ribs, or deformation that improves concrete grip and maintains a strong bond between the two components.

Cold Twisted Bars: Cold twisted bars are produced using a cold twisting process in which bars are hardened and twisted while still cold. Twisting, on the other hand, can cause surface defects on steel bars due to the occurrence of torsional stress in the rebar. Torsional stress is caused by an applied torque while twisting an object.

The fundamentals of TMT Bar: TMT bar goes through a metallurgical process that combines mechanical or plastic deformation with a thermal process. TMT stands for Thermo Mechanical Treated, which is how these bars are made. Mechanical deformation includes compression or rolling, whereas thermal deformation includes heat-treatment, water quenching, and cooling all in one course.

The hot rolling process, which passes heated iron billets through rollers of decreasing diameter, comes first in the production of TMT bars. After the hot rolling process is completed, the bars are water cooled by a microcontroller with a controlled quenching chamber in which a temperature gradient travels from the core to the surface.