Ameron Structures Private Limited

 How Do Super Ductile Rebars Work
During an earthquake, frequent shaking of the ground and its amplitude may generate stresses that exceed the rebars'' yield strength. To prevent the collapse of buildings, it is necessary that even when the stress exceeds the yield strength, it should not exceed the tensile strength. This has been made possible with tata tiscon super ductile rebars, designed to have a much higher uts/ys ratio compared to ordinary rebars. In other words, they can be plastically deformed to a much larger extent without crossing their ultimate tensile strength. This prevents any sudden collapse of buildings. 

Chemical Properties
Tata tiscon super ductile rebars guarantee more than the basic characteristic strength as per bis-1786. They offer superior properties with respect to percentage elongation and uts/ys ratio compared to the standards and are in-line with the international norms of the ''high ductile'' speciality rebar. The high ''uniform elongation'' ensures that even after large plastic deformation, the rebars do not start ''necking''- a phenomenon which initiates ultimate failure.
Chemistry -tata tiscon super ductile rebars are made with a unique chemistry with critical control over carbon, sulphur, phosphorus and other alloying elements. Carbon equivalent is maintained at a lower range to facilitate good weldability. Billets are cast with electromagnetic stirring to eliminate harmful segregation. The heat size is as high as 140 mt which ensures consistent properties over a large batch. Moreover, it has restricted nitrogen levels as per the latest international norms for a high quality rebar which in turn improves the resistance against critical torsional stresses that are encountered by the structural members during an earthquake.
Rolling-the billets are rolled in most advanced mills with all plc drives for maintaining very narrow range of temperatures and other rolling parameters which are critical for making rebars super ductile. The rebars also have very close dimensions, prominent rib pattern and surface finish. For certain sections, tungsten carbide rolls are used in place of conventional steel rolls to enhance the surface quality and bond strength with concrete. 
Super Mechanical Properties
Tata tiscon super ductile rebars have a minimum characteristic yield strength of 500 mpa as specified in bis-1786 which means, structural designing need not incorporate any deviation from the standard characteristic strength assumptions. In fact, the uts and ductility being greater than specified in the standard, the rebars ensure enhanced safety during earthquakes. Due to higher uts but same characteristic yield strength, rebars acquire more bendability resulting in ease of work at sites. Moreover, the bent portion retains higher residual ductility, critical to prevent any brittle failure. 

Other Details
Here comes the complete reform with the Super Ductile Tata Tiscon It is the newest and most formidable force to build a future perfect construction. A testament
to the unmatched trust of Tata Steel, it is India’s first Green Pro certified rebar and is manufactured using industry leading innovative automation. Made from virgin iron ore and pure steel, every rebar has more load carrying capacity because of its supreme strength and ductility. Not to
mention its enhanced earthquake resistant properties. mention its enhanced earthquake resistant properties. 

Strength of the Kamdhenu TMT Bars are carefully controlled by optimizing the water pressure for their pearlitic core and tough surface of tempered marten site, thereby providing an 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. TMT Bars are thermo-mechanically-treated through leading world tempcore based technology for high yield strength. The process involves rapid quenching of the hot bars through a series of water jets after they roll out of the last mill stand. The bars are cooled, allowing the core and surface temperatures to equalize. The bar core cools down slowly to turn into a ferrite -pearlite aggregate. Kamdhenu Limited, Bhiwadi unit has been authorized to manufacture Tempcore TMT under licence agreement.
Features of TMT Bars
Enhanced strength combined with high ductility
Excellent weldability without loss of strength at welded joints
Better ductility and malleability
Earthquake resistant
High thermal resistance
Significant savings in cost of steel
Other Details
Standard Length- 12 m
Diameter- 6,8,10,12,16,20,25, 28, 32 mm 
 

As we look to the future, we have anticipated what will be required for our country to achieve lean steel structure that is yet the strongest and brings value for money. 
Steel offers the widest range of strength compared to other metals giving it significant advantage in construction. There are more than 200 grades of steel globally, and we take pride in offering Jindal Panther- Fe 550D - the strongest grade in TMT so far in practice. 
This grade of steel is produced using a technology such that it has two desirable properties simultaneously, higher strength and higher ductility, thereby making it most suitable for earthquake resistant structures. Higher strength is achieved by the addition of certain alloying elements, keeping the percentage of carbon lower, thereby ensuring that the steel remains sufficiently ductile. 
Benefits
Reduction of Steel Consumption Designing structures with Fe 550D reduces the steel consumption by 12-15% with optimization, using consistent primary steel.

Reduction Bar Congestion
Using stronger grade steel means reduction in bar diameter that results in increased bar spacing as fewer rebars are needed. 

Reduction in Labour Cost
Using lesser steel requires less labour and saves on labour cost. 

Faster Construction
Less time is wasted on placing/ tying of bars. And less weight on cranes improves construction efficiency 

Bigger Savings
Since Fe 550D rebars are stronger than other rebars, the overall steel consumption comes down leading to cost savings. It also results in increased Floor Space Index thus giving monetary benefit of extra space generated. 
 

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Other Details
Standard Length- 12 m
Diameter- 6,8,10,12,16,20,25, 28, 32 mm