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Thermo-Mechanically Treated bars (TMT bars) are reinforcement bars that have a hard outer core and a softer inner core. These strong and flexible steel bars are used to increase the strength of the structure. TMT bars are manufactured by passing hot rolled steel bars through icy water. The steel wire is initially passed through a rolling mill stand. Then the same rolling steel wire is passed through the water cooling system. The cold water helps to optimise pressure. This sudden quenching and change in temperature make the outer layer hard while maintaining its softer core. TMT bars gain high tensile strength and elongation points through this manufacturing process. Along with that, it also gains ductility, weldability and corrosion resistance.
TMT bars are of three major types based on their grade,
The grade determines the stress level to be applied to cause a deformation in the bar’s size.
Fe-500 Grade TMT steel bars have tensile strength and ductility, and are used in the construction of buildings and bridges.
Fe-550 Grade TMT steel bars have similar properties to Fe-500 Grade, except for the fact that they have higher tensile strength. This is used in the construction of structures that are exposed to coastal, marine or underground environments.
TMT binding wire is used in tying the rebars at the joints that hold the structure together.
TMT bars come in different sizes and diameters like 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 32mm and 36mm. And the usage of these bars depends upon their diameter.
TMT bars |
Price per piece (in Rs.) |
8 mm |
454 + 18% GST |
10 mm |
696 + 18% GST |
12 mm |
986 + 18% GST |
16 mm |
1754 + 18% GST |
20 mm |
2741 + 18% GST |
25 mm |
4273 + 18% GST |
The weight of one TMT road can be calculated using the formula (dia x dia)/ 162 x 12, where dia is the diameter of the rod. You can use L1 Supply’s TMT material calculator to estimate the amount of materials you will need for your construction project.
TMT bars have their applicability across a wide variety of fields
These were the details regarding TMT bars, usage and their prices. There are more than 10 companies that produce TMT bars in India, with Tata Steel Ltd, JSW Steel Ltd, Jindal Steel and Power Ltd and Essar Steel being the leading producers. TMT bars gained widespread popularity due to their strength and shock resisting capacity and continue to be an important aspect of construction.
Ready to explore more? Head over to our Product Page for the complete catalogue of TMT bars.