What is Tmt Bars? [Types of Tmt Bars] - Buildpro Store

The majority of modern structures get their strength from TMT steel bars interwoven through them, from the homes we live into the offices we spend our days working to the bridges and flyovers we pass through during our commute. To say that TMT bars are the backbone of our daily lives would not be a boast. 

What is Tmt Bar? 

Thermo Mechanically Treated (TMT) bars, often known as TMT bars, are produced using a special process that gives them a hard exterior and a soft interior. This makes the TMT bar strong but also flexible.

Without TMT bars, the present building sector would unquestionably be less resilient and far more expensive.

Manufacturing Process

  1. The steel wires are passed through a rolling mill stand as part of the initial process of making TMT bars.
  2. After that, the water cooling system is once more fed through the rolled steel wires.
  3. The water pressure is optimised while the wires are being passed through the cooling water system.
  4. The steel bar's outer layer becomes tougher due to the abrupt quenching and significant temperature shift, which increases its durability.
  5. After finishing this procedure, the TMT bars are exposed to air cooling.
  6. The inner core stays soft, providing the TMT bar with excellent tensile strength and elongation point.
  7.  This is done to equalise the temperature differential between the soft inner core and The inner core.
  8. This design is exclusive to TMT bars and enhances the bars' ductility. This bar is corrosion-resistant and more weldable due to its unique manufacturing process and lack of cold stress.

    Check out - Tmt Bar Weight Chart 

    Features of TMT bars

    1. Resistant to earthquakes
    2. Heightened strength and excellent ductility
    3. Increased thermal resistance
    4. Improved malleability
    5. Strong welded joints with excellent weldability.
    6. Cost-efficient


      Leading TMT steel bar manufacturers

      1. Tata Steel Ltd
      2. ArcelorMittal SA
      3. Jindal Steel & Power Ltd
      4. Essar Steel
      5. JSW Steel Ltd
      6. Kamdhenu Ltd

        Also, read - Top 10 Tmt Bars in India

        Recent price trends in the TMT market (Average Rates):

        TMT Bars


        8 mm

        Rs 35,000 + 18% GST

        10/12 mm

        Rs 34,000 + 18 % GST

        16/20/25 mm

        Rs 34,000 + 18 % GST

         Price per tonne in December 2020 (Average Rates) :

        TMT Bars


        8 mm

        Rs 45,000 + 18% GST

        10/12 mm

        Rs 44,000 + 18 % GST

        16/20/25 mm

        Rs 44,000 + 18 % GST



        Check out - TMT Steel Price in Bangalore Today

        Types of TMT Bars

        TMT bar manufacturers in India produce –

        1. Fe-415 – The ideal TMT bar grade for residential buildings and housing is this one. They have increased elongation, which makes them ideal for use in earthquake-prone areas while building structures. Due to their anti-resistant coating, these bar grades are also resistant to corrosion and rust.
        2. Fe-500 – For residences and residential construction, this grade of TMT bar is ideal. They have greater elongation, which makes them ideal for use in buildings in earthquake-prone areas. These bar grades include anti-resistance coating, which makes them resistant to rust and corrosion as well.
        3. Fe-550 – They are used for building projects that Fe-500 can manage as well as those that are a little bit more challenging because they are somewhat better than the Fe-500 grade.
        4. Fe-600 – Heavy industrial building typically uses this kind of TMT grade since it needs to be exceptionally strong and hardy. The tensile strength of this grade is higher than that of any other grade.

          What Are The Advantages Of TMT Bar

          The steel is exposed to temperatures as high as 1100 degrees Celsius thanks to new cutting-edge technologies. After the steel "billets" have been shaped in rolling mills, they are quickly chilled using a procedure called quenching, in which a high-pressure water spray cools the outside surface of the bars while the inner core cools gradually on cooling beds.

          The exterior portion of the bars is exceptionally strong thanks to the two-layer cooling process, while the inner core is more ductile.

          Let’s look at the advantages TMT bars bring to the construction industry –

          1. More strength – The bars' exceptional strength makes them a perfect material to mix with concrete to strengthen structures. The TMT bars'distinctive ribbed pattern gives them greater strength by tying them more closely to concrete. Since pre-welded meshes may be produced off-site, the building process can be completed faster thanks to the malleability of TMT bars.
          2. Corrosion-resistant – The bars get anti-rust qualities because of the TMT production process. The cause of corrosion in steel, coarse carbides, are prevented from accumulating during the water-cooling phase, making TMT steel buildings more durable.
          3. Fire-resistant – TMT bars' strong thermal stability allows them to endure temperatures between 400 and 600 degrees Celsius, guaranteeing the building's structural integrity even in the case of a fire.
          4. Earthquake proof – The significant degree of ductility imparted by the TMT bars' soft core gives structures made of TMT additional flexibility to handle dynamic and seismic loading.
          5. Cost-effective – Because TMT bars offer superior elongation and higher tensile strength, less steel is required for a given amount of construction. This lowers the price of raw materials while also saving money on storage and shipping. TMT steel bars are also simpler to handle on the job site, which results in additional cost savings because building and fabrication take less time.

            Applicability of TMT bars

            TMT bars have now become the gold standard in construction and are used widely in diverse projects, such as –

            1. Residential projects
            2. Highrise residential buildings
            3. Office / industrial structures
            4. Dams
            5. Long span bridges and flyovers
            6. Large structures such as Malls, Schools, Airports, Hospitals, etc.
            7. Underground structures
            8. Underwater or marine structures


              TMT bars ought to be the first choice of steel if you intend to build a long-lasting, affordable, and robust construction. However, to make sure one is working with a genuine, high-quality product, it is imperative to purchase from a renowned manufacturer.


              What is meant by the TMT bar?

              TMT stands for thermomechanical treatment, and these TMT steel bars are typically utilised as building materials to improve protection against earthquakes and other types of natural disasters.

              Why TMT bar is used?

              TMT bars are perfect for general-purpose concrete reinforcing constructions, bridges and flyovers, dams, thermal and hydroelectric power plants, industrial buildings, high-rise structures, platforms in metro railroads, and fast transportation systems.

              What is the difference between and rebar?

              Although both TMT bars and Cold Twisted rebars are excellent strengthening bars, they differ in how they are constructed. Twisted rebars are typically produced using a more traditional cold twisting process, whereas TMT bars use more recent hot twisting technology.

              How many types of TMT are there?

              Fe-415, Fe-500, Fe-550, and Fe-600 are the four categories of TMT bars that are produced by Indian TMT bar producers. The grades show the amount of pressure required to deform it, and the higher the grade, the more superior and strong the bar are. The grades are assigned based on the stiffness and strength of the material.

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