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TATA TISCON 500D, a product from Tata Steel, is the new generation high strength ribbed reinforcement bar. It is different from ordinary bars in its method of manufacturing and consequently, in its combination of properties.
TATA TISCON is the only rebar in India which has acquired the 'Superbrand' status.
Reinforced Cement Concrete (RCC) has become the most easy and effective construction material of modern times. Almost all the residential complexes and individual houses are being constructed with this versatile material. The beauty of this material lies in two aspects— first, the ability of Cement-Concrete to take the desired shape and secondly, the ability of steel reinforcement bars or rebars to resist all kind of forces acting upon a building. Plain Cement Concrete (PCC) without rebars is like a body without bones.
Rebars make buildings safe for its residents by tolerating various damaging forces acting on building members e.g. foundations, beams, columns, slabs, etc. These forces are generated because of different loads like the dead load of the building itself, the live load of occupants and their belongings, the wind/storm load, the earthquake load, etc. which act in different combinations at different times. That is why, to make the buildings strong and long-lasting, steel rebars must be of good quality and strength.
Rebars are like bones in a human body providing basic strength to any structure and unlike tiles, fittings, paints and other items, rebars once used cannot be replaced ever.
Tata Steel, the sixth largest steel producer in the world, is the first company in India to introduce Thermo Mechanically Treated reinforcement bars, using the latest technology available world-wide. TATA TISCON 500D rebars are produced in state-of-the-art plants under close supervision of our frontline metallurgists and engineers. The basic steel is made from virgin iron ore through Blast Furnace-Basic Steel Making-Secondary Refining-Billet Casting route with lowest amount of undesirable impurities and rolled in fully automated rolling mills from world renowned suppliers.
Tata Steel has set up a new bar mill with the latest technology supplied by Morgan, USA. This mill has both horizontal and vertical stands, a series of zero-tension loopers and a fully automated bar bundling and master bundling system. Spacious billet yard for cast-wise stacking of billets, reheating furnace, pm-finishing and finishing mill, cold shear to cut bars, roughing mill, intermediate mill and the latest TMT facilities are the other features of the bar mill. TATA TISCON 500D rebars are 'hot rolled' from steel billets and subjected to PLC controlled on-line thermo-mechanical treatment in three successive stages:
Why is TATA TISCON 500D superior to traditional rebars in the market? As mentioned in the beginning, Sulphur & Phosphorus (S&P) are harmful impurities in steel. High levels of Phosphorus can lead to 'cold shortness' in steel where the steel tends to become very brittle under extreme cold conditions and thus vulnerable to cracking. High level of Sulphur can lead to 'hot shortness' in steel, a condition in which the melting point of steel gets lowered thereby reducing its strength dramatically under high temperature conditions. However, lower levels of S&P can be achieved only through advanced steel making technology. Such low S&P levels, as specified in the 5000 specifications of BIS, are almost impossible to be achieved through normal scrap & induction furnace route. At Tata Steel, due to state-of-the-art steel making facilities as well as the stringent quality controls at every step, from mines to the mill 100% of the rebars are now produced in compliance to the 500D grade specifications.
TATA TISCON is produced through a combination of superior processes. The steel for TATA TISCON 500D is produced through primary steel making route, using iron ore from captive mines. It is subsequently processed through the blast furnace, LD & LF (ladle refining) to refine the steel to the fullest extent and continuously cast into billets. The resultant steel is of superior quality, containing no harmful ingredients (like Sulphur and Phosphorus) and ensures the desired and consistent properties in the rebar.
Cast billets are hot rolled in fully automated rolling mills equipped with computer controlled process monitoring devices to ensure uniform properties in each rebar. All our rolling mills are fully modernized with the latest rolling technologies employing state-of- the-art tungsten carbide rolls in place of conventional steel rolls which ensure excellent dimensional tolerance and surface finish. The superiority of TATA TISCON 500D is further detailed in the subsequent sections.
TATA TISCON 500D is produced in Fe 5000 IS: 1786 grade. However, its carbon levels are maintained at much lower than the specification, which results in its excellent ductility, high bendability, better corrosion resistance and superior weldability. The other undesirable impurities (like Sulphur and Phosphorus) that impair the overall longevity of rebars inside constructions are also maintained at much lower than specifications In TAM TISCON 5000.
This is possible because of the purity of steel In TAM TISCON 500D, which Is 100% processed through the primary steel making route with refining facility unlike secondary routes, As TATA TISCON 500D does not have any undesirable elements, its intrinsic quality to withstand load under adverse conditions is enhanced.
TATA TISCON 500D's unique method of manufacturing creates a combination of strength and ductility that far exceeds the minimum limit specified in the standard IS: 1786. In the case of the yield strength for TATA TISCON 500D, though the standard specifies a minimum of 500 N/mm2, and designers use this value for design, the typical values are as high as 540 N/mm2. For the same product, the typical value of ductility as measured by elongation is 18% minimum as against the standard value of 16% minimum. Undoubtedly, the superior values of strength and ductility are a guarantee of higher levels of safety for ages. UTS / YS ratio and percentage elongation are important properties in a rebar that reflect the ability to handle the pressure of earthquakes. Higher these values, the better.
Bendability
The special microstructure of TATA TISCON 5000 results in a rebar with excellent bendability. The bar can be bent easily and sharply. TATA TISCON 500D can be bent to the exact angle unlike ordinary rebars as desired by the design around mandrels, and is much smaller in diameter than what is specified in IS: 1786. This has obvious advantages at construction sites.
Weldability
TATA TISCON 5000, due to its low carbon equivalent, has weldability which is superior to ordinary rebars. It can be butt-welded or lap-welded using ordinary rutile coated electrodes of matching strength. In manual arc welding, no pre-warming or post-welding treatment is necessary.
Although steel and concrete are two different materials, they have to behave as a single unit in a reinforced structure. This can happen only when the concrete grips the steel rebar to form the strongest bond through the unique rib pattern of the rebar. TATA TISCON 500D has a unique rib pattern in terms of greater rib depth and closer rib spacing. Its ribs are made using computer controlled CNC notch cutting machines.
Rib patterns on the mbar surface provide quality bonding with cement only when they are produced through CNC machined Rolls.
This ensures uniform rib pattern for 100% of the rebars, which allows uniformly strong bonding with concrete for the whole structure. This is in contrast to the ordinary rebars, where ribs are cut manually which always leaves scope for non-uniform rib pattern and thereby, non-uniform and weaker bonding throughout the structure. Due to uniformity and critically designed ribs, fatigue strength of TATA TISCON 5000 is much superior to ordinary rebars.
TATA 11SCON 500D rebars are available in the following sizes at the retail/distribution network across India: 6, 8, 10, 12, 16, 20 and 25 mm.
Each TATA TISCON 5000 rebar is supplied In a fixed length of 12 metres to ensure standard processing and thereby, causing less wastage during fabrication. TATA TISCON 500D is supplied section-wise in convenient pre-packed bundles with fixed number of pieces per bundle.
Selling by piece — Every TATA TISCON rebar is sold in a standard length of 12 metres thereby removing the hassle of weighment.
Free Home Delivery — TATA TISCON rebars are delivered by the dealer at the work site of the customer free of charge.
Recommemled Consumer Price (RCP) — TATA TISCON rebars are sold at RCP for better transparency. The RCP's are displayed at all dealer outlets.
Availability — TATA TISCON rebars are available across India at more than 1800 authorized dealer outlets.
TATA TISCON is the only rebar in India which has acquired the 'Superbrand' status.
Reinforced Cement Concrete (RCC) has become the most easy and effective construction material of modern times. Almost all the residential complexes and individual houses are being constructed with this versatile material. The beauty of this material lies in two aspects— first, the ability of Cement-Concrete to take the desired shape and secondly, the ability of steel reinforcement bars or rebars to resist all kind of forces acting upon a building. Plain Cement Concrete (PCC) without rebars is like a body without bones.Rebars make buildings safe for its residents by tolerating various damaging forces acting on building members e.g. foundations, beams, columns, slabs, etc. These forces are generated because of different loads like the dead load of the building itself, the live load of occupants and their belongings, the wind/storm load, the earthquake load, etc. which act in different combinations at different times. That is why, to make the buildings strong and long-lasting, steel rebars must be of good quality and strength.
Rebars are like bones in a human body providing basic strength to any structure and unlike tiles, fittings, paints and other items, rebars once used cannot be replaced ever.
Tata Steel, the sixth largest steel producer in the world, is the first company in India to introduce Thermo Mechanically Treated reinforcement bars, using the latest technology available world-wide. TATA TISCON 500D rebars are produced in state-of-the-art plants under close supervision of our frontline metallurgists and engineers. The basic steel is made from virgin iron ore through Blast Furnace-Basic Steel Making-Secondary Refining-Billet Casting route with lowest amount of undesirable impurities and rolled in fully automated rolling mills from world renowned suppliers.
Tata Steel has set up a new bar mill with the latest technology supplied by Morgan, USA. This mill has both horizontal and vertical stands, a series of zero-tension loopers and a fully automated bar bundling and master bundling system. Spacious billet yard for cast-wise stacking of billets, reheating furnace, pm-finishing and finishing mill, cold shear to cut bars, roughing mill, intermediate mill and the latest TMT facilities are the other features of the bar mill. TATA TISCON 500D rebars are 'hot rolled' from steel billets and subjected to PLC controlled on-line thermo-mechanical treatment in three successive stages:
- Quenching - The hot rolled bar leaving the final mill stand is rapidly quenched by a special water spray system. This hardens the surface of the bar to a depth optimised for each section through formation of martensitic rim while the core remains hot and austenitic.
- Self Tempering - When the bar leaves the quenching box, the core remains hot compared to the surface, allowing heat to flow from the core to the surface, causing tempering of the outer martensitic layer into a structure called 'Tempered Martensite.' The core still remains austenitic at this stage.
- Atmospheric Cooling - This takes place on the cooling bed where the austenitic core is transformed into a ductile ferrite-pearlite structure. Thus the final structure consists of an optimum combination of a strong outer layer (tempered martensite) with a ductile core (ferrite-pearlite). This gives TATA TISCON 500D its unique combination of higher strength and ductility.
Why is TATA TISCON 500D superior to traditional rebars in the market? As mentioned in the beginning, Sulphur & Phosphorus (S&P) are harmful impurities in steel. High levels of Phosphorus can lead to 'cold shortness' in steel where the steel tends to become very brittle under extreme cold conditions and thus vulnerable to cracking. High level of Sulphur can lead to 'hot shortness' in steel, a condition in which the melting point of steel gets lowered thereby reducing its strength dramatically under high temperature conditions. However, lower levels of S&P can be achieved only through advanced steel making technology. Such low S&P levels, as specified in the 5000 specifications of BIS, are almost impossible to be achieved through normal scrap & induction furnace route. At Tata Steel, due to state-of-the-art steel making facilities as well as the stringent quality controls at every step, from mines to the mill 100% of the rebars are now produced in compliance to the 500D grade specifications.TATA TISCON is produced through a combination of superior processes. The steel for TATA TISCON 500D is produced through primary steel making route, using iron ore from captive mines. It is subsequently processed through the blast furnace, LD & LF (ladle refining) to refine the steel to the fullest extent and continuously cast into billets. The resultant steel is of superior quality, containing no harmful ingredients (like Sulphur and Phosphorus) and ensures the desired and consistent properties in the rebar.
Cast billets are hot rolled in fully automated rolling mills equipped with computer controlled process monitoring devices to ensure uniform properties in each rebar. All our rolling mills are fully modernized with the latest rolling technologies employing state-of- the-art tungsten carbide rolls in place of conventional steel rolls which ensure excellent dimensional tolerance and surface finish. The superiority of TATA TISCON 500D is further detailed in the subsequent sections.
TATA TISCON 500D is produced in Fe 5000 IS: 1786 grade. However, its carbon levels are maintained at much lower than the specification, which results in its excellent ductility, high bendability, better corrosion resistance and superior weldability. The other undesirable impurities (like Sulphur and Phosphorus) that impair the overall longevity of rebars inside constructions are also maintained at much lower than specifications In TAM TISCON 5000.
This is possible because of the purity of steel In TAM TISCON 500D, which Is 100% processed through the primary steel making route with refining facility unlike secondary routes, As TATA TISCON 500D does not have any undesirable elements, its intrinsic quality to withstand load under adverse conditions is enhanced.
| Chemical Properties | Unit | IS:1786 Fe 500 |
IS:1786 Fe 500D |
TATA TISCON 500D* |
| Carbon | % | 0.300 max | 0.250 max | 0.250 max |
| Carbon equivalent (C + Mn/6) | % | 0.420 max | 0.420 max | 0.400 max |
| Sulphur | % | 0.055 max | 0.040 max | 0.035 max |
| Phosphorus | % | 0.055 max | 0.040 max | 0.035 max |
| S and P | % | 0.105 max | 0.075 max | 0.070 max |
| as ontained in 90% of the heats |
TATA TISCON 500D's unique method of manufacturing creates a combination of strength and ductility that far exceeds the minimum limit specified in the standard IS: 1786. In the case of the yield strength for TATA TISCON 500D, though the standard specifies a minimum of 500 N/mm2, and designers use this value for design, the typical values are as high as 540 N/mm2. For the same product, the typical value of ductility as measured by elongation is 18% minimum as against the standard value of 16% minimum. Undoubtedly, the superior values of strength and ductility are a guarantee of higher levels of safety for ages. UTS / YS ratio and percentage elongation are important properties in a rebar that reflect the ability to handle the pressure of earthquakes. Higher these values, the better.
| Mechanical Properties | Unit | IS:1786 Fe 500 |
IS:1786 Fe 500D |
TATA TISCON 500D* |
| Yield Stress (YS) | N/mm2 | 500 min | 500 min | 540 min |
| Ultimate Tensile Strength (UTS) | N/mm2 | 545 min | 565 min | 600 min |
| UTS/YS | Ratio | 1.08 min | 1.10 min | 1.12 min |
| Elongation | % | 12 min | 16 min | 18 min |
| as ontained in 90% of the heats |
Bendability
The special microstructure of TATA TISCON 5000 results in a rebar with excellent bendability. The bar can be bent easily and sharply. TATA TISCON 500D can be bent to the exact angle unlike ordinary rebars as desired by the design around mandrels, and is much smaller in diameter than what is specified in IS: 1786. This has obvious advantages at construction sites.
Weldability
TATA TISCON 5000, due to its low carbon equivalent, has weldability which is superior to ordinary rebars. It can be butt-welded or lap-welded using ordinary rutile coated electrodes of matching strength. In manual arc welding, no pre-warming or post-welding treatment is necessary.
Although steel and concrete are two different materials, they have to behave as a single unit in a reinforced structure. This can happen only when the concrete grips the steel rebar to form the strongest bond through the unique rib pattern of the rebar. TATA TISCON 500D has a unique rib pattern in terms of greater rib depth and closer rib spacing. Its ribs are made using computer controlled CNC notch cutting machines.
Rib patterns on the mbar surface provide quality bonding with cement only when they are produced through CNC machined Rolls.
This ensures uniform rib pattern for 100% of the rebars, which allows uniformly strong bonding with concrete for the whole structure. This is in contrast to the ordinary rebars, where ribs are cut manually which always leaves scope for non-uniform rib pattern and thereby, non-uniform and weaker bonding throughout the structure. Due to uniformity and critically designed ribs, fatigue strength of TATA TISCON 5000 is much superior to ordinary rebars.
TATA 11SCON 500D rebars are available in the following sizes at the retail/distribution network across India: 6, 8, 10, 12, 16, 20 and 25 mm.
Each TATA TISCON 5000 rebar is supplied In a fixed length of 12 metres to ensure standard processing and thereby, causing less wastage during fabrication. TATA TISCON 500D is supplied section-wise in convenient pre-packed bundles with fixed number of pieces per bundle.
Selling by piece — Every TATA TISCON rebar is sold in a standard length of 12 metres thereby removing the hassle of weighment.
Free Home Delivery — TATA TISCON rebars are delivered by the dealer at the work site of the customer free of charge.
Recommemled Consumer Price (RCP) — TATA TISCON rebars are sold at RCP for better transparency. The RCP's are displayed at all dealer outlets.
Availability — TATA TISCON rebars are available across India at more than 1800 authorized dealer outlets.
- Only rebar brand in India to be acknowledged as a consumer "Superbrand" 2009-10
- Made in the only steel plant in India to have the highest level of quality certification (Deming Award from JUSE)
- Only rebar brand in India to be accredited the prestigious CARES certificate by UK for its quality compliance
- Made in the world's best steel plant - Rated by World Steel Dynamics for several years during 2004-2008 (2004, 2006, 2007)
