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Once this process is over, the TMT bars are subject to atmospheric cooling. This is done in order to equalise the temperature difference between the soft inner core and the tough exterior. Once the TMT bar cools down, it slowly turns into a ferrite-pearlite mass. The inner core remains soft giving the TMT bar great tensile strength, shock absorbing resistance and elongation point. This design is unique to the TMT bars and gives superior ductility to the bars. Also, this unique manufacturing technology of V Rib and the absence of Cold stress makes this bar corrosion-resistant and also boosts its weldability.