Captain Steel

Thermo-Mechanically Treated bars, better known as TMT bars, are high-strength reinforcement bars that have a tough outer surface and a soft inner core. The strength of TMT bars is controlled by optimising the water pressure to render a soft core and tough exterior surface, thereby providing optimum strength, ductility and toughness.

TMT bars are widely used in general purpose concrete reinforcement structures, bridges and flyovers, dams, thermal and hydel power plants, industrial structures, high-rise buildings, underground platforms in metro railway and rapid transport system.

The manufacturing process of TMT Bar involves the following steps
Step 1- Manufacturing of billets from raw materials:
Step 2 - Heating, Rolling and formation of reinforced bar:
Step 3 - Quenching:
Step 4 - Self-tempering:
Step 5 - Atmospheric Cooling:

- Earthquake resistant.
- Enhanced strength combined with high ductility.
- High thermal resistance.
- Better malleability.
- Can be easily welded without loss of strength at places of welding.
- Cost-efficient.

- Better bending strength, better ductility, better malleability, better thermal resistance, and better corrosion resistance.
- It saves time in the Reinforcement process.
- Reduces the cost of the labour.
- Lesser weight, hence, a reduction in transportation cost.
- Easy processing since easily bendable without losing strength.

- Ease of bending, rebending and reverse bending
- Can be Butt-welded/ Lap welded
- High corrosion resistance.
- No significant changes in strength due to aging.
- Weldability and excellent ductility
- Easy bendability factor
- Ideally suitable for a concrete structure.
- No huge change in quality at high temperatures.
- The use of high tmt grade rebars ensures around 15-17% savings in steel.
- Low carbon content.
- Percentage of elongation and tensile strength is high, high yield stress, the rate of prolongation is high
- Greater ductility for usage in seismic zones
- Greater resistance to higher temperatures
- Better bendability and greater weldability
- Better corrosion resistance property

Fe-415, Fe-500, Fe-550, and Fe-600 are four different grades of TMT bars produced in India.
These grade numbers signify the stress level that must be applied to make any deformation in the bar. More stronger and superior bars have higher grade. According to their strength and rigidity, the respective grades are given.
Decorative structures like balcony railings etc are made with low graded bars, but for core building structures like roofs and floors high graded bars are used.
Usually for residential constructions and homes, Fe – 415 is suitable whereas Fe – 600 bars are used for industrial use. For construction of bridges and underground structures, versatile bars like Fe – 500 and Fe – 550 are preferred.

Please send your application to reachus@captainsteel.com