Tata Steel is the first company in India to introduce Thermo Mechanically Treated reinforcement bars using the latest technology available worldwide. “TATA TISCON” TMT bars are produced in state-of-the-art plants under close supervision of our frontline metallurgists and engineers. Although there are many TMT bars available in the country today, it is only the ones that are produced through a process with adequate capabilities, process optimization and strict control that should be used. TATA STEEL has perfected the art of steel making and is the only company in India having nearly 100 years of steel making and rolling experience.
  
   Chemistry Unit IS:1786 Fe 415 Tata Tiscon*
   Carbon % 0.30** max 0.17-0.24
   Carbon equivalent
   (C + Mn/6)

%

_

0.38 max

   Sulphur % 0.060 max 0.050 max
   Phosphorus % 0.060 max

0.045 max

   S & P % 0.110 max 0.090 max
   Nitrogen ppm _ 120 max
* (Typical Values for 90% of heats)
** (In case of weldable bars, the carbon content & the carbon equivalent should be 0.25% max & 0.42% max respectively)   
 
 
     
 
   
Rashtriya Ispat Nigam Ltd.
 
 
 
Rashtriya Ispat Nigam Ltd. is one among those very few steel companies who use raw material (billets and ingots) with ISI mark& uses 19 stage production process to manufacture steel bars from ingots, to ensure utmost strength to the Rashtriya Ispat Nigam Ltd. TMT steel bars. Rashtriya Ispat Nigam Ltd., the company's brand, is born out of the latest German TMT (thermo mechanical treatment)technology. Rashtriya Ispat Nigam Ltd.TMT bar conforms to global standards in every aspect - in earthquake resistance, ductility, weldability, bonding, etc. Explaining further, Rashtriya Ispat Nigam Ltd. TMT is the brand leader today in India. Rashtriya Ispat Nigam Ltd. TMT helps customers save up to as much as 15% to 25%on steel costs.
 
 
Specifications :
   Grade  Conforming to
   Cold heading
Low carbon (0.10% max), medium carbon (0.31 -0.45%), and high carbon (in a 5 point carbon range starting from 0.46%) grades can be supplied to required specifications.
   Tolerances :
As per IS-7887/IS-11169/DIN-59110/ASTM-A-510M JIS-G-3191/JIS-G-3505/JIS-G-3506/JIS-G-3507 BS-4956.
   Features :
Stelmor cooling process results in high ductility, uniform grain size, and exact metallurgical & mechanical properties.
Tungsten carbide rings in pre-finishing and finishing Morgan blocks ensure excellent surface finish and rigid dimensional tolerance.
High pressure compactors with automatic tying retain tight and proper coil shape.
  Diameter range (mm) : 5.5 6 6.5 7 8 9 10 12 12.7
  Sectional wt (Kg/M) .186 .222 .260 .302 .395 .499 .617 .888 .995
 
     
 
     
 
  .
 
Application
 
  Specification Application Special Qualities
  SAIL TMT General concrete reinforcements in high rise buildings, bridges and other concrete structures. Excellent bendability, good weldablity and high fatigue resistance on dynamic loading
 
Chemical Composition
 
  Specification Grade C% Mn% max P% max S% max CE max
  SAIL TMT Fe 415 0.25   0.050 0.050 0.100
Fe 500 0.25   0.050 0.050 0.100
Fe 550 0.25   0.050 0.050 0.100
 
     
  Mechanical Properties  
     
 
  Specification Grade Yield Strength MPa min Ultimate Tensile Elongation Strength Bend Test min % min
  SAIL TMT       Up to 28 mm Above 28 mm    
Fe 415 415 415     2d 3d
Fe 500 500 500 20.0 18.0 2d 3d
Fe 550 550 680 18.0 16.0 2d 3d