How's TMT Bar Manufactured?
TMT bars are manufactured through a highly controlled and specialized process. The steel billets are usually hot rolled and subjected to Thermo-Mechanical Treatment for producing TMT bars.
Let’s take a look at the entire manufacturing process of TMT bars:
Steel billets have to undergo multiple steps before they finally turn to TMT bars. These are as follows:
1. Procurement of Raw Material
The first step is to procure the iron for manufacturing TMT bars. Iron is collected either by extracting it from the iron ore using a standard extraction process of by getting the raw material from scrap dealers. Once procured, the iron is then brought to the furnace or the factories.
2. Melting the Iron
The iron is then put into the furnace and is melted. The chemical composition of the molten iron is then tested. After testing, it is then adjusted by adding or extracting some components.
3. Casting of Iron
After the chemical composition is adjusted, the iron is either fully or partially solidified. This depends on the requirement. The iron is cast into two shapes: Ingot (small solid iron pieces) and Billets (elongated steel that’s used for manufacturing TMT bars and other longer elements.
4. Rolling
Ingots and Billets are rolled to get an appropriate thickness. Rolling is of two types:
Hot Rolling: Here, the ingots and billets are rolled when they are red hot to get the desired thickness.
Cold Rolling: Here, they are rolled only after they have cooled down. In cold rolling, the ingots and billets need to be rolled for a longer time to get the desired thickness.
5. Stamp Rolling
This is the step when the ribs are engraved on the surface of the TMT bars.
6. Chemical Treatment of the bars
The TMT bars are chemically treated after the rolling process, making them tensile.
7. Bundling
After the Chemical treatment, the TMT bars are cooled down. The bars are then bundled together according to their thickness and grades and sent to the dealers.
Best TMT Bars Kolkata
Before buying TMT bars, ensure that you are buying from the best TMT bar manufacturer. If you are planning to buy TMT bars for construction, check the products by SRMB. These bars are corrosion resistant, have greater elongation and have excellent bending and re-bending properties.
Visit https://www.srmbsteel.com/tmt-bars to know more about their products.












