Thermo Mechanically Treated bars or TMT bars are one of the most commonly used steel bars today for construction purposes, the others being High Yielding Strength Deformed (HYSD) bars and Cold Twisted Deformed (CTD) bars. Constructors and even homeowners themselves are opting for these bars. Find out about some of the top reasons to use these bars for the purpose of construction.
These bars are made with thermo mechanical treatment, which uses temperature gradient between the hot inside core and the cooler surface. Due to this type of treatment, an extreme hard outer surface can be developed. After being subjected to high temperatures, TMT bars are shaped subsequently by the twisting and rolling of the structure.
Comes in different grades
These steel bars can be availed in various grades, which are:
- Fe-415 – Used as a earthquake and corrosion proof solutions
- Fe-500 – Used for building concrete structures, such as bridges and buildings
- Fe-550 – Used for keeping constructions stronger in underground, marine or humid coastal regions
- Fe-600 – Used for big RCC constructions , hence strength is required than elasticity
The more the grade, the less the elongation is and the higher the tensile strength and yield strength is.
TMT steel bars are flexible and do not suffer cracks even when bent 180 degrees. Due to better elongation, the steel has more ductility. These have a higher elongation rate, which makes them easily transportable and allows higher savings than CTD bars. Fe 500D TMT bars come with higher ‘sudden load absorption’ capacity, and are chosen due to being ductile in form. These are ideal for regions that are prone to natural calamities such as cyclones and earthquakes.
These bars are corrosion resistant, and eliminate risk of cracking of construction structures due to the accumulation of rust – which has more volume as compared to steel. While construction corrosion resistant TMT bars, Phosphorus, Chromium, Copper and other elements are blended. Thus, these kinds of bars offer more protection to structures in under water / underground or humid coastal environments.
Before you choose TMT bars from a specific batch of a brand, check whether the company has ISO and ISI certifications, there is company seal in the bars at every meter length, there is any Ferrous coating or rusting on the surface, the bar length and weight is of IS Standards and there are sharp transverse ribs around the bar surface to allow more comfortable grip. Visit https://toptechtmt.com/best-tmt-bar/ for more details.