TMT Bars
TMT is an acronym for the phrase ‘thermo-mechanical treatment’. The Bureau of Indian Standards while issuing the code ISI: 1786-1985 (reaffirmed 2004) used this phrase while making reference to the ‘Technological advances during the last few years in the field of deformed bar production have helped in meeting all the above requirements together.
Microalloying with Nb, V, Ti and B in combination or individually, and thermomechanical treatment process are worth mentioning in this field’ in para 0.2.1 of its FOREWORD
We are one of the renowned distributers of TMT rebars across Chennai. Our rebars meet stringent quality standards and exhibit higher strength, better ductility, bend ability and weldability. TMT Bars HYQST(High Yield Quenched and Self Tempered) through METCS (Morgan Enhanced Temperature Control System)Process developed by Morgan USA and MECTHERM Process (Rapid Water Quenching System) developed by MECON LIMITED . This gives the bar excellent ductility, bendability and also high strength.
The quality of TMT bar depends on major factors like quality raw materials, a properly designed and automated mill, and a well-designed quenching and tempering technology. All bars are purchased based on the properties of yield strength, tensile strength and elongation values.
IS: 1786-1985 (Reaffirmed 2004) Fe-500, Fe-500 D, Fe-550, Fe-550 D, and Fe-600
| Diameter | Weight per Meter (kg/mt) | Tolerance % |
|---|---|---|
| 8 mm | 0.395 | +/-7 |
| 10 mm | 0.617 | +/-7 |
| 12 mm | 0.888 | +/-5 |
| 16 mm | 1.579 | +/-5 |
| 20 mm | 2.466 | +/-3 |
| 25 mm | 3.854 | +/-3 |
| 28 mm | 4.83 | +/-3 |
| 32 mm | 6.314 | +/-3 |
| 36 mm | 7.99 | +/-3 |
| 40 mm | 9.86 | +/-3 |
Product Grade
Reinforced steel bars of the following grades:
FE - 500
Fe-500 grade steel bars can yield minimum stress of 500 N/mm2. These bars can bend easily as they are produced under regulated manufacturing processes. These bars have easy bendability, ...resistance to rust, and an unmatched welding strength. Fe-500 can give 20% cost savings as compared to FE-415 due to its superior structural strength. Usage of Fe-500 results in lesser number of TMT Bars required to hold the structure as compared to Fe-415.
FE - 500 D
One of the best TMT bars available today, the Fe-500 D grade bars have an ability to yield a minimum stress of 500 N/mm2 and possess a high percentage of elongation. ‘D’ in Fe-500 D ...grade denotes ductility. This property helps these bars to preserve steel and resist earthquake shocks.
FE - 550
Similar to Fe-500, TMT bars of this grade differ by providing a yield of 550 N/mm2, and are actively used in construction projects based in marine, coastal, or underground environments. ...Fe-550 can give 10% cost savings as compared to Fe-500 due to its superior structural strength. Lesser number of Fe-550 TMT bars are required to hold the structure as compared to Fe-500.
FE - 550 D
Superior to Fe-550, Fe-550 D possesses a yield of 550 N/mm2, but has higher weldability, better ductility, and a higher ultimate strength. The ‘D’ in Fe-550 D, which stands for higher ductility ...makes it vibration and earthquake resistant. Fe-550 D is mostly used in the construction of long span structures like high-rise buildings, dams, bridges, etc.
| CHEMICAL PROPERTIES (IS 1786:2008) | ||||
|---|---|---|---|---|
| ELEMENTS (Maximum%) | Fe-500 | Fe-500 D | Fe-550 | Fe-550 D |
| Carbon% | 0.30 | 0.25 | 0.30 | 0.25 |
| Sulphur% | 0.055 | 0.040 | 0.055 | 0.040 |
| Phosphorus% | 0.055 | 0.040 | 0.050 | 0.040 |
| Sulphur and phosphorus% | 0.105 | 0.075 | 0.100 | 0.075 |
| MECHANICAL PROPERTIES (IS 1786:2008) | ||||
|---|---|---|---|---|
| PROPERTY | Fe-500 | Fe-500 D | Fe-550 | Fe-550 D |
| Yield strength (N/mm2) | 500 | 500 | 550 | 550 |
| Ultimate Tensile Strength, Min (N/mm2) | 545 | 565 | 585 | 600 |
| Elongation Min (%) | 12 | 16 | 10 | 14.5 |
TMT Steel Bar weight calculator comes in handy when civil contractors, engineers, or architects ask builders or owners to get a particular quantity of TMT steel bars for construction.
The requirement for steel bars might be in the number of rods (pieces), the number of bundles (kg) or metric tons (mt) as it is the most recommended method by engineers and contractors.
FAQ's
What is the Formula to Calculate the Weight of Steel Bar?
The formula for weight of steel bar is W=D2L/162.
Here,
W= Weight of the TMT Steel Bars
D= Diameter of TMT Steel Bar in Millimetre (mm)
L= Lenth of TMT Steel Bar in Meter (m)
For example, the weight of a steel bar with 60m length and 12 mm diameter will be,
If we substitute the variables of the weight of steel bars formula, the calculation would be: W=122 x 60/162=53kgs
What’s the Typical Steel Bar Weight?
The weight of steel bar varies according to its diameter and length of it. Typically, 8mm and 1m TMT steel bars would weigh between 0.375 & 0.400.
How Do You Calculate Steel Bar Weight Per Meter?
The formula for weight of steel bar per meter is W=D21/162
For example, if it’s an 8mm steel bar, the formula would be 821/162, which equals 0.395 kgs.
What is the Unit for Weight of Steel Bar?
TMT steel bar weight is typically denoted in kilograms (kgs), Tonne (T or Ton) and Pounds (lbs).
CRS Rebars
CRS TMT Re-Bars have been exposed to very rigorous corrosion mediums and evaluated for various corrosion resistant properties as per ASTM standard viz. Immersion Test, Salt Spray Test, Exposure Test, Dioxide Test and Dynamic Test. The result of such corrosion tests indicated that CRS TMT Re-bars are having corrosion resistant index (CRI) of 1:7min as compared to CRI of normal TMT Re-Bars
TMT-CRS Re-Inforcement Bars are best applied for :
IS: 1786-1985 (Reaffirmed 2004) Fe-500, Fe-500 D, Fe-550, Fe-550 D, and Fe-600
- Oil & Gas Exploration sites
- Bridge & Dam Construction
- Highway & Flyover Construction
- Sea Port Construction.
- Jetty Construction.
- Terminal Construction
- Thermal & Hydel Power Station Construction.
- Industrial Structures.
- Hazardous Area Construction.