o r e t o c o r e

AISCO TMT Rebars – “Ore to Core” Excellence

AISCO TMT rebars are manufactured using the innovative “ore to core” concept within our integrated steel plant, ensuring uncompromised quality control at every stage of production.

The journey begins with high-grade sponge iron, valued for its low sulphur and phosphorus content, high metallic value, and uniform composition. This sponge iron is melted in carefully monitored furnaces, where samples from each batch are analyzed to maintain precise chemical balance. Alloying elements are added as required to achieve the desired grade of steel.

The refined molten steel is then cast into billets through a Continuous Casting Billet Machine (CCBM), ensuring uniformity and consistency. These billets are further rolled into TMT rebars using state-of-the-art rolling facilities.

Finally, the rebars undergo advanced quenching and self-tempering technology, forming a tough outer martensitic layer with a ferrite–pearlite core. This unique microstructure imparts the rebars with superior strength, durability, ductility, and resistance to seismic and dynamic stresses—making them ideal for modern infrastructure projects.

Iron Ore to Molten Steel

5. Cutting & Bundling

• Standard Length: Rebars are supplied in standard 12-meter straight lengths.

• Bundle Formation: Prepared either as straight-length bundles or U-shaped bundles, depending on dealer requirements or direct site delivery needs.

• Securing: Each bundle is firmly tied with steel/binding wire and tagged with size, grade, weight, and manufacturer details.

• Standard Count: Bundles are made as per fixed piece count and diameter-wise weight standards for uniformity and ease of handling.

Rebar's Ferrite-Pearlite Core

3. Treating (TMT Process)

• Quenching: Hot rolled rebars are rapidly cooled with water jets, forming a hardened surface.

• Self-Tempering: Heat from the core reheats the outer martensite layer, tempering it to improve toughness.

• Atmospheric Cooling: The core slowly cools in air, producing a ductile ferrite–pearlite structure inside.

• Final Property: A tough outer surface with a ductile inner core, ensuring strength, ductility, and earthquake resistance.

2. Shaping

• Casting: Refined molten steel is solidified through continuous casting into semi-finished billets or blooms.

• Rolling: The billets are passed through a series of rolling mill stands, where they are progressively reduced to the required diameter. Precision CNC rib-cutting rolls and automatic thickness-control systems ensure uniform rib geometry and accurate sizing of the finished rebars.

6. Delivery

• Loading: Bundles are loaded onto trucks or trailers.

• Transport: Dispatched to dealers, distributors, or directly to construction sites.

• Assurance: Timely delivery with proper documentation (invoice, test certificates, quality tags).

We ensure excellence at every stage of our integrated steelmaking journey—transforming iron ore into smelted, refined, and tempered sustainable deformed steel rebars.

1. Making

• Raw Material to Sponge/Pellets: Iron ore, coal, and dolomite are processed to produce sponge iron.

• Steelmaking: Sponge/pellets are melted in a furnace (EIF), refined into molten steel (LRF), and alloying elements are added to achieve the required grade and strength of TMT rebar.

4. Testing of Rebar (NABL-Certified Laboratory)

• Mechanical properties: Yield strength, UTS, elongation, bend/re-bend.

• Bond strength: Rib pattern adherence.

• Microstructure analysis for uniformity.

• Chemical Testing: Conducted through spectrometer analysis to verify and confirm the chemical composition of steel.

Ensures compliance with IS 1786 / ASTM A615 or equivalent standards.

Molten steel to sems-Billets (for long products- rebar, rods, wire)

Accreditations, Approvals & Certifications

Trusted accreditations and approvals ensure that AISCO products meet stringent national and international standards. Our comprehensive test reports and compliance systems are integral to maintaining high-quality benchmarks across every stage of production and operation.

By rigorously adhering to industry regulations, we consistently reinforce our credibility in the marketplace. Our certifications are more than formal recognitions—they validate our commitment to excellence, safety, and sustainability.

Our Key Accreditations & Certifications include:

• IS:1786 Certification – High Strength Deformed Steel Bars for Concrete Reinforcement

• BIS (Bureau of Indian Standards) License – Compliance with Indian quality standards

• ISO 9001:2015 – Quality Management System

• ISO 14001:2015 – Environmental Management System

• ISO 45001:2018 – Occupational Health & Safety Management System

• NABL Accreditation – Certified mechanical & chemical testing laboratories

• Government & Institutional Approvals – Empanelment with leading infrastructure and public sector bodies

These achievements serve as a testament to AISCO’s proactive approach in upholding integrity, quality, and responsibility. They strengthen long-term trust with clients, stakeholders, and partners, enabling us to confidently navigate the complexities of the steel sector.