TMT Rebar and Deformed Bars used mainly in construction works as Reinforcing bars or steel for supporting concrete. Rebar’s surface is often “deformed” with ribs, lugs or indentations to promote a better bond with the concrete and reduce the risk of slippage.
Rebar is produced from carbon and low-alloyed steel grades by either hot rolling or cold rolling. In Hot rolling Rebar is produced in Rolling mills from billets. In the reheat furnace, the Square Billets at room temperature of 20 to 30 °C transferred from the steelmaking process are reheated to up to 1,050 to 1,150 °C so that they become soft enough to be lengthened to the desired thickness and length.
The Square Billets extracted from the reheat furnace is passed through about rolling stands comprising of roughing stands, intermediate stands and finishing stands to form shapes of steel bars.
On the cooling bed, the Square Billets passed through the rolling mill are cooled down. The walking beam cooling bed system allows them to cool down by air flow created on all sides and move to the sawing machine. After the stringent quality test, the products transported from the cooling bed are cut to the lengths desired by customers and packed by bundle through an automated mchine. The packed products go through the identification process in which rebars are color coded according to their specific grade.
When producing cold-formed rebar, the feedstock, i.e. round hot-rolled steel, is put between the rotating plain or grooved rolls of the rolling mill. Thus, plain and ribbed, cold-rolled rebars with a diameter of 4-12 mm are made.
- Fe – 415
- Fe – 500
- Fe – 500D
- Fe – 550