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Leading TMT bar manufacturers in West Bengal

HEXA, part of the Jai Balaji Group, stands out as a renowned and leading manufacturer of TMT bars in West Bengal, renowned for its production of world-class steel bars. Employing cutting-edge thermex technology, JBG HEXA TMT bars undergo thermo-mechanical treatment to ensure high-yield strength. With a focus on delivering superior quality, JBG HEXA manufactures grade bars equipped with top-notch features tailored for the construction industry. The manufacturing process takes place at Integrated Steel Plants, where all stages of raw material processing occur under one roof.

The exceptional balance of strength and ductility characterizing JBG HEXA TMT bars yields designs with optimal safety and minimal reinforcement requirements. Moreover, these bars exhibit remarkable resilience against seismic activities, ensuring enhanced safety. As one of the largest TMT bar manufacturers in West Bengal, JBG HEXA stands at the forefront of providing high-grade steel bars for diverse construction projects. Renowned for its integrated steel manufacturing capabilities, the company is synonymous with excellence in the steel industry in West Bengal. Notably, JBG HEXA is acclaimed for its production of high-strength, advanced steel products tailored for the automotive sector.

Strong Grip
Earthquake Resistant
Fire Resistant
Higher Elongation
Better Weldability

Why choose the JBG HEXA TMT bars?

(TMT Bar Manufacturer in West Bengal)

1. The TMT bars score high on strength and ductility.
2. They are thermo-mechanically treated through a leading world thermex.
3. Excellent weldability without loss of strength at welded joints.
4. Smooth finish ensuring classy appearance and defect-free structure.
5. High weldability hence, keeping construction structure unchanged.
6. Bars have fixed lengths for easy construction.
7. Earthquake resistant and high thermal resistance.


Thermomechanical treatment

Thermo mechanical treatment is a metallurgical process combining mechanical or plastic deformation processes like compression, forging, rolling etc., with thermal operations like heat-treatment, water quenching, heating and cooling at various rates, into a single process. The four metal physical processes in TMT- hardening, recovery and recrystallisation, precipitation, and allotropic transformations make use of microalloying elements, which play an important role in TMT. By selective regulation of temperature and casting conditions, steel’s material properties are heightened manifolds, which would otherwise not be possible through traditional methods of production.

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Application of thermomechanical processing in rebars steel

The water quenching process transforms inexpensive, low carbon steel into high-strength bars. This process involves immersing the bar’s surface layer in water, exerting pressure on the crystal structure of intermediary layers and deforming them. Concurrently, it tempers the quenched layers using heat derived from the bar’s core.

Steel billets, also referred to as “pencil ingots”, with a diameter of 130 mm, undergo heating to temperatures ranging from approximately 1200° C to 1250° C in a reheat furnace. Subsequently, they undergo progressive rolling to achieve the desired shape and size of the reinforcing bar. Following rolling, the billets pass through a quench box, where the surface layer undergoes conversion to martensite, inducing shrinkage. This shrinkage applies pressure on the core, facilitating the formation of correct crystal structures while retaining the core’s heat and austenite. A microprocessor is instrumental in maintaining temperature differentials across the bars’ cross-sections, ensuring consistent mechanical properties throughout the processes.

Upon exiting the quench box, the bar exhibits a temperature gradient across its cross-section. As the bar cools, heat migrates from the centre to the surface, enabling appropriate tempering of an intermediate ring of martensite and bainite by the bar’s heat and pressure.

Ultimately, the slow cooling post-quenching automatically tempers the austenitic core to ferrite and pearlite on the cooling bed.

These bars feature varying microstructures across their cross-sections, comprising robust, resilient, tempered martensite in the surface layer, an intermediate layer of martensite and bainite, and a refined, ductile core of ferrite and pearlite.

As a premier and renowned TMT bar manufacturer operating in West Bengal, we leverage cutting-edge technology to produce high-grade TMT bars, ideal for robust construction projects.

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