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Different types of tests performed to ascertain the quality of TMT Rebars


There is a rising demand for TMT Bars (Thermo Mechanically Treated Bars) across the globe. Thanks to their vast applications in commercial and residential constructions. TMT bar plays a vital role in the construction of fortified structures. So, selecting the best quality TMT bar is crucial. There are many brands in the market, but the best brand of Rebar will make your home is last longer.

The different grades of Rebars are

  • Fe 415
  • Fe 500
  • Fe 550D
  • Fe 600
where numbers indicate the yield strength.

Some reasons why they are the preferred choice among builders

The TMT bar you choose should be a perfect amalgam of strength and flexibility. The Fe500 steel is ideal for all construction purposes per IS Standards, as it boasts the perfect balance of longevity and flexibility.

There are some tests to ensure the quality of the TMT bar. The following tests determine the strength and elongation.

  • Tensile Testing
  • Yield Stress Testing
  • Bend/Re-bend testing
  • Chemical Analysis

Tensile Testing:

The manufactured Rebars tested for consistency with the help of a Universal Testing Machine (UTM). The strength of rebars is measured using a UTM only when the diameter of the Rebar is above 32mm according to IS 1786, for Rebars with 32mm capacity can be tested without the need for a UTM to measure the strength of reinforcement bars.

Yield Stress Testing:

How do you determine up to which level the material can handle stress? And when it starts to deform plastically? Knowing the Yield Stress can give you answers to your questions. Until the material reached the Yield Point, it will continue to elastically Deform and get back to its original shape only when stress is released. Therefore, the materials are divided based on the behaviour into two types, ductile and brittle. Steel and Aluminium are Ductile materials, while Glass and cast iron are brittle materials. The two categories are distinguished by comparing the stress-strain diagram.

Bend/Re-Bend Testing:

Choosing the wrong material for the manufacture of Rebars can lead to poor quality that bends easily. It is crucial to evaluate the Rebar either during a purchase or in the construction site to check its bending properties. This test ensures that the bending radii are not below the relative standard sizes. The performance of steel reinforcement can be badly affected due to incorrect bending.

Chemical Analysis:

The chemical test performed by inspecting the chemical composition testing in the spectrometer takes a few seconds to give results in a printed form of the 26 elements present in the TMT bar. Chemical Analysis is used to find the percentages of Carbon, Phosphorus, Copper, Manganese, Chromium, and Sulphur with the spectrometer. Detailed quantitative and qualitative analyses performed using this advanced instrument.

In Conclusion:

So, when you decide to buy TMT bars for the construction of your home, to make sure your home lasts long, choose the best TMT bar. Choose Bharathi TMT, with over 50 years of experience, sourcing the best quality raw materials and manufacturing the finest grade Rebars.
We undertake these tests for TMT bars to ensure the quality and strength of the steel we provide. It is, for this reason, suggested to buy steel bars from reputed and trusted brands that perform tests to assess the quality of their Rebars.

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