Description.
Colling takes place on the walking cooling bed, where the austenitic core is transformed to a ductile ferrite-pearlite core. The final structure comprises the combination of a strong outer layer of tempered martensitic and ductile core of ferrite-pearlite.
The bar leaves the quenching box with the temperature of the core being higher than that of the surface. This allows the heat to flow from the core to the surface, consequently tempering the surface resulting in a structure called tempered martensitic. This process is called self-tempering.
The hot rolled bar leaves the final mill stand and is rapidly quenched by a special water spray system. This converts the surface layer of the bar to a hardened structure.
Sugna TMT Bar possess a combination of strength and ductility in excess of the minimum limits specified by IS:1786. These superior values of strength and ductility represent higher level of safety.
Sugna TMT conform to IS:1786 specification which result in excellent ductibility, hight bending capability and a superior welding strengths. Chemistry IS:1786/1985 SUGNA TMT Carbon (Max %) 0.30 0.12-0.25 Manganese (%) 0.5-1.2 0.5-1 Sulphur & Phosphorous As per IS:1786/1985 As per IS :1786/1985
The soft ferrite-pearlite core of Sugna TMT bars enables them to bear dynamic & seismic loading.
Sugna TMT is guaranteed for not being heavy & comes with a section weight that is lower than the normal.
Sugna TMT bars have low carbon content which gives it superior weldability. No pre-warming and post welding is required in manual arc welding.
The tough outer surface and the soft core of Sugna TMT bar make the bar bendable and ideal for construction. As per the specification of IS : 1786 for bending around much smaller mandrels, an unbreakable advantage at construction sites.
An inseparable bonding takes place between Sugna TMT bars and its surrounding concrete. This is due to the specially designed rib pattern of Sugna TMT Bars.
