logo
10 MM TMT BAR MANUFACTURERS IN ANDHRA PRADESH

Modern construction owes its foundation to the use of steel reinforcement to provide concrete with a natural lack of tensile strength. Within this context, the two following terms can appear such as TMT bar and rebar. Although they have a close connection in that they are even used interchangeably, they do not seem to be the same. The name rebar means Reinforcement Bar and can take any steel bar to add strength to concrete.

Concrete has high compressive strength but low tensile strength, so steel reinforcement is embedded to resist tension forces. Rebars can be of different types, such as mild steel bars (with a smooth surface), deformed bars (with ribs or ridges for improved grip), epoxy-coated rebars for enhanced corrosion resistance, or stainless steel rebars for specialised applications. Essentially, rebar is a broad category that covers all steel reinforcement bars regardless of how they are manufactured or treated.

TMT bar, however, is a given type of rebar manufactured by a sole kind of processing commonly referred to as Thermo-Mechanical Treatment. TMT bars production occurs after hot rolling the steel billets and subjecting them to rapid quenching upon water jets. The outside skin hardens quickly, but the core inside stays warm. After some time, the surface cools down because of leftover heat. This creates a hard layer of martensite on the outside and a soft, more flexible core of ferrite pearlite. Lastly, it takes ambient air to cool the bars and get the ideal balance between strength and flexibility. The result of this hi-tech manufacturing process is that TMT bars are ensured with unique properties of increased tensile strength, enhanced ductility, superior corrosion resistance and ability to withstand earthquakes as opposed to most conventional rebars.

The major distinction is that not all rebars are TMT bars as well as not every TMT bar is a rebars. Rebar is a very general term whereas TMT is a specification of a high performance rebar. As an example, conventional medium grade steel rebars or cold-twisted deformed bars (CTD) could not be thermo-mechanically treated, thus they possess reduced strength and ductility. On the other hand, TMT bars that come in grades such as Fe-415, Fe-500, Fe-550 and Fe-600 have been designed to meet present-day construction needs. They have excellent strength-to-weight ratio, so less steel is required to obtain the same strength thus reducing costs of projects. They have a ductile structure that does not crack when bent, an important characteristic in seismic regions, where they have more elongation qualities, particularly in the Fe-500D type that are rated as D grade.

The other method of distinguishing between them is by the effective resistance against corrosion. Temped structure on the surface of TMT bars is in existence due to its manufacturing character. This increases their resistance to rust compared to most of the other rebars particularly in areas, which are located along the coast or with high humidity. They are also resistant in fires as they do not weaken easily despite increases in temperature. Ordinary rebars have to be coated with epoxy or galvanized to survive as long as they do under severe conditions. This implies that TMT bars rarely require any additional treatments to accomplish the high-performance projects or long lives projects and therefore, planning constructions becomes easy.

Homes, bridges, dams, and skyscrapers that have reinforced concrete are all made using rebars. The necessity of the project as per its structure, weather condition, and budget will decide between the common rebars and the TMT ones. Traditional rebars are still used in small and relatively cheap constructions in stable locations. TMT bars tend to be good on large scale projects or high rise or even superior in seismically prone places or in highly humid areas.

img Contact us

NS Epoxy stands as the frontrunner in TMT manufacturing, committed to constant innovation and research. Our focus is to ensure our product technology remains cutting-edge, precisely tailored to meet client's requirements.