TopTechBest TMT Bars
Which TMT bar should you choose? Only TopTech combines strength, durability, and advanced technology to keep your home safe for generations. Build worry-free with steel you can trust.
Toptech Original X-Ribs TMT advantages
Fire
Resistant
Superior
Bendability
Good Impact
Toughness
High Strength
& Ductility
Excellent
Weldability
Best Value
TMT Bar
Original X-Ribs Advantage
Engineered rib technology designed for unmatched strength, grip, and durability.
Advanced Rib Technology
Stronger bonding with TopTech TMT
Unique Rib Design
Specially engineered rib geometry that enhances mechanical interlocking with concrete.
8-Point Concrete Contact
Improved surface contact ensures superior load distribution and crack resistance.
TMT Bar Features
Sturdy Build TopTech TMT Bars exhibit consistent superior strength and high ductility which ensures superior structures.Corrosion Resistant The controlled thermo mechanical treatment results in an uniform and thick tempered martensitic rim, completely free from internal stress.
Strength
e: 415/500/550/600 grade which are much stronger than conventional CTD Bars and give upto 20% stronger concrete structure with same quantity of steel
Mechanical Properties
The advanced manufacturing process of TopTech TMT Bars makes it well surpass the minimum limit of strength and ductility specified in the standard IS: 1786.
Bend Properties
Many times better bend/re-bend properties which makes it not only easy to work but safe in hazardous situations.
Earthquake Resistance
Uniform energy dissipation for each cycle indicates high ductility and superior seismic resistance for Toptech TMT Bars. This is essential for minimising structural damage and casualties.
Corrosion Resistant
Negligible rusting in comparison to Cold Twisted Bars, even after a long period of time means longer life of concrete structure, i.e. buildings.
Chemical Composition
Toptech TMT Bars are manufactured after the incoming billets are analysed for chemical composition and are segregated for unwanted material like cast iron, non-metallic, non-ferrous etc.
| Section (mm) | Normal Weight (kg/meter) | Tolerance |
|---|---|---|
| 5.6 mm | 0.194 kg/mtr | +/- 7% |
| 8 mm | 0.395 kg/mtr | +/- 7% |
| 10 mm | 0.617 kg/mtr | +/- 7% |
| 12 mm | 0.888 kg/mtr | +/- 5% |
| 16 mm | 1.58 kg/mtr | +/- 5% |
| 20 mm | 2.47 kg/mtr | +/- 3% |
| 25 mm | 3.85 kg/mtr | +/- 3% |
Chemical Properties (Maximum)
| Properties | Fe 500 | Fe 500-D | Toptech 500 D (Typical) |
|---|---|---|---|
| % Carbon | 0.300 | 0.250 | 0.250 |
| % Carbon Equivalent (CE) | 0.420 | 0.420 | 0.400 |
| % Sulphur (S) | 0.055 | 0.040 | 0.035 |
| % Phosphorus (P) | 0.055 | 0.040 | 0.035 |
| % Sulphur & Phosphorus (S&P) | 0.105 | 0.075 | 0.070 |
| % Nitrogen | 120 | 120 | 120 |
Mechanical Properties (Minimum)
Structural Integrity| Properties | Fe 500 | Fe 500-D | Toptech 500 D (Typical) |
|---|---|---|---|
| Yield Stress - YS (N/mm²) | 500 | 500 | 520 |
| Ultimate Tensile Stress - UTS (N/mm²) | 545 | 620 | |
| UTS/YS Ratio | 1.08 | 1.10 | 1.15 |
Bending Instructions of TMT Bars
Suggested Mandrel Diameter for Different Grades
| SL No. | Nominal Size (mm) | Suggested Mandrel Diameter (mm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fe 415 | Fe 415D | Fe 415S | Fe 500 | Fe 500D | Fe 500S | Fe 550 | Fe 550D | Fe 550S | |||
| 1 | Upto and Including 20 | 30 | 50 | 20 | 40 | 30 | 30 | 50 | 40 | 50 | |
| 2 | Over 20 | 40 | 30 | 30 | 50 | 40 | 40 | 60 | 50 | 60 | |
Note: 0 is the normal size of the TMT Bar in mm. An example of bar bending for 25mm 500D grade TMT Bar would require a Mandrel Diameter of 40mm as per the chart above.