The integrated and advanced manufacturing process ensures optimum quality at every stage of the production process. The manufacturing process can effectively be classified into five categories as follows
High quality sponge iron(processed iron ore) is melted to a temperature of 1700Celsiusin highly efficient and advanced induction furnaces. After ensuring the desired chemistry and the addition of required alloys, the steel is transferred for casting into billet.
After the molten metal is metallurgical tested, it is brought to the casting machine to cast high quality semi finish i.e billets and cut into desired length and sent for rolling.
The billets produced are then rolled while hot in temperature in the rolling mill to the desired size. The bars get ribs and lugs for better gripping in this process.
The cooled TMT bars are then cut to length of standard 12 meter and sent to the lab for further and final testing. After the approval from lab, the TMT bars are dispatched.
After rolling, the hot rolled bars are cooled by spraying clean water under high pressure. This process creates a hard outer layer to provide strength and a soft inner layer to provide ductility. This is how Thermo Mechanically Treated (TMT) bars are made in desired Fe-500 Grade.