A versatile material, steel has played a vital role in the construction industry. With its multitude of features like superior strength, toughness and ductility, high strength to cost ratio, improved safety in construction and operation and greater flexibility, it has become the preferred material in construction.

However, the non-availability of the right quality, cost effective steel and absence of corrosion resistance technology has been one of the major hurdles in its growing popularity. While Cold Twisted Deformed (CTD) bars did meet the demand for low-cost, high-strength reinforced steel bars and were cheap alternatives to costly alloying elements such as Cr, Ni, V, Nb, Ti, they sacrificed the two essential properties of weldability and elongation.

The search for a process better than CTD led to the development of Thermex technology. With their high-strength, high-ductility properties, Thermex bars overtook the popularity of CTD bars. Thermex technology revolves around a precise, state-of-the-art Thermo-Mechanical-Treatment (TMT) developed and patented by Hennigsdorfer Stahl Engg. (HSE) Gmbh, Germany.

Thermex is the only rapid water quenching process that guarantees consistent properties over the entire bar length. The Thermex cooling technology involves subjecting the bar to a sophisticated hi-tech cooling process after rolling. This treatment converts the bar surface to a hardened structure. The subsequent phase involves cooling at ambient temperature to allow the hot core to temper the surface through thermal exchange. This results in a unique structure of tempered martensite in the peripheral zone and a fine grain ferrite-pearlite at the central zone.