Constructions play a vital role in day-to-day life. And super strong TMT bars play a vital role in reinforcing these constructions. From bridges to industrial complexes, TMT rods can be seen in a variety of constructions.

Thermomechanically treated or TMT is a term used to indicate high tensile and durable steel rods that are manufactured using a special process. The steel billets are quickly cooled when in high temperatures to create a soft inner core and a hard outer surface.

This cooling process gives superior strength to these steel bars as well as ductility.

Why are TMT steels a popular choice?


Super strong TMT bars make for an ideal option to be used in construction. The unique rib pattern on their surface provides additional strength to the building by bonding with concrete.


The unique manufacturing process of TMT bars also gives them anti-rust properties. The rods can deter chloride and carbides – two of the most important agents that cause corrosion in metals.


The high ductility of the steel bars makes them ideal for constructions situated in earthquake-prone regions. These structures can be made to manage dynamic loading during seismic activity.

High temperature 

Super strong TMT bars can manage exposure to high-temperature levels. The limit usually ranges from 400 to 600 degrees Celsius. As a result, the structural integrity can be maintained even during fires as well.

Cost factors 

The tensile strength of these TMT bars reduces the steel consumption in any construction project. This helps to reduce the cost of raw materials as well as transportation. Since the bars are managed on-site, the fabrication time is also reduced.

Ways to test TMT bars for strength 


Deterrents like dust, scales, paint, and grease can affect the strength of TMT bars. Most importantly, this could be detrimental to the bonding capacity of these rods. For this reason, it is essential to clean the contaminants off the surface of TMT bars before reinforcing concrete with them. Notably, make sure to clean excessive rust from the surface as well.


Manufacturers are more likely to brand super strong TMT bars with name, logo, diameter, and industry standards. Contractors should check the rods of these markings. It should be considered as a red flag if the surface is lacking any of such markings. They should also check with local government organizations.

Bending test 

It is essential to check the steel bar with a bending and rebending test. As per IS 1599, the bar should be bent at 180 degrees Celsius before being restored to the original length. Once bent, take a magnifying glass and minutely check the surface of the bar to identify any cracks or ruptures. These signs are qualities of a bad steel bar that may lead to major calamities.

This testing process also consists of rebending the bar at 135 degrees. The prepared sample is immersed into boiling water for 30 minutes before being bent to 157 degrees. Once the step is finished, check the sides for any cracks. Super strong TMT bars will pass both of these tests.

Reinforcement checks 

Acquire one section from each bar bundle and test the samples for length and weight measurement. The tensile strength and ductility of these bars should also match the figures specified by the manufacturer. They also offer manufacturing information to consumers with online portals and forums.

iSteel super-strong TMT bars are manufactured using state-of-the-art techniques to reinforce structures with maximum integrity and flexibility. Our robust, high-tensile steel rods can also withstand environmental factors and natural disasters with ease.