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Kamdhenu
Product Range:

Our TMT bars are available in varied sizes like 8, 10,12,16,20,22,25,28 and 32. We even make custom made products according to you needs.

  • Trade Mark - Kamdhenu & Kay2 TMT
  • Grades - Kamdhenu & Kay2 TMT Grade Fe- 415, Fe - 500, Fe -415D & Fe -500D
  • Diameter - 8,10,12,16,20,25 MM (28 and 32 min. On bulk demand)
  • Standard Length - 5.5 mtrs. To 12 mtrs.
kamdhenu
Our Product Portfolio:

Kamdhenu TMT bars are the most popular reinforcement bars in India. High speed latest technology TMT grade Fe - 415D, Fe - 500 D has the best strength with mildness, better corrosion resistance, better bond strength with cement, excellent ductility, easy work ability at site, steel saving of 14 - 19%, reduction in construction costs.

Features of Kamdhenu 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
Bond Strength:

The ribbed pattern of Kamdhenu TMT Bars has been specially designed to ensure excellent bondage between the bar and the surrounding concrete. While specifications stipulate a 40% higher bond strength than that of Mild Steel Bars, Kamdhenu TMT Bars boasts 100%-200% higher values.

Bending & Re-bending:

Kamdhenu Tmt Bars have outstanding bending properties and bend and re-bend without cracking. The tough outer surface and a ductile core result in a rebar with extremely high bendability. The bars can be bent around mandrels much smaller than those specified in IS:1786.

Weldability:

Kamdhenu TMT Bars offers superior weldability than conventional cold twisted bars due to its low carbon equivalent. They can be easily butt-welded or lap-welded using ordinary coated electrodes of similar strength. No pre-warming or post heat treatment is necessary in manual arc welding either.

Corrosion Resistance:

Kamdhenu TMT Bars are produced by thermo-mechanical treatment and not by cold twisting therefore eliminating torsion residual stress in the bars which tender superior corrosion resistance.

High Temperature Resistance:

Kamdhenu TMT Bars retain more than 80% of its ambient temperature yield strength at 300oC and 40% at 5000C.

Dimensional Tolerances:

Kamdhenu TMT Bars are supplied with section weight lower than the nominal. They are guaranteed to be lesser than the nominal and less than 1% heavy.

Seismic Resistance Properties:

Kamdhenu Tmt Bars revealed superior seismic resistance properties during simulated earthquake conditions on reinforced concrete beam columnjoints to evaluate performance under repeated reverse-loading with inelastic strains. The energy dissipation was found to be almost the same for each cycle indicating uniform ductility till failure.

Economics of Savings:

Kamdhenu Tmt Bars are new generation rebars with usable yield stress in excess of that for Fe-415 Grade of IS:1786. Hence, their use on the basis of either the working stress or limit state method as per IS:456 - 1978, would result in substantial savings in steel costs as compared to a typical T-beam floor built with mild steel bars.

SAVINGS IN WEIGHT & COST:
  KAMDHENU TMT Bars
Characteristics CTD 415 415 500
Design 415 450 N/mm2 530 N/MM2
Quantity 1.0 Mt. 92 Mt. 78 Mt.
Required % of
saving weight over
CTD 415
8.0% 22.0%
Saving in cost
relative to CTD
415 / Mt.
Rs. 2104 Rs. 5,786
SAVINGS BY USING WELDED JOINTS:
Type of Lap Lap Length Required Material Requirement Cost % Cost Saving Per Joint / Bar
Conventional based on
concrete steel bonding
For dia 20mm bar lap of 50mm
length of bar required 1w = 5Od
1000mm
2.47kg of bar @ 26,300 / Mt. Rs. 64.90  
For Lao joints in
Kamdhenu TMT Bars
1w = 6.3d 126 mm 0.31 kg of bar @ 26,300 / Mt. Rs. 8.15 87.4%
Kamdhenu Exceptional Standards:
Test ISI Standard KAMDHENU TMT Bars
0.2 Proof Test Tensile
Strength % age
Elongation Bend Test
Rebend Test
415 500 550 415 500 550
415N/sq mm 500N/sq mm 550N/sq mm 480N/sq mm 525N/sq mm 575N/sq mm
485N/sq mm 545N/sq mm 585N/sq mm 550N/sq mm 600N/sq mm 660N/sq mm
14.50% 12.00% 8.00% 18.50% 14.50% 10.50%
Upto incl.22mm 3D Satisfies Bend Test
Over 22 mm 4D
Upto incl.22mm 3D Satisfies Re bend Test
Estimated weight & numbers per bundle:
Diameter
(mm)
Bundle length
(ft)
Number of
TMT Bar
Weight of per meter
(gms)
Weight of bundle
(kg)
Permissible diff.
(%)
Bending diameter
(mm)
8 40 15 379-411 72 -4 3D
10 40 8 598-636 60 -3 3D
12 40 6 870-906 64 -2 3D
16 40 3 1548-1612 58 -2 3D
20 40 2 2445-2495 60 -1 3D
25 40 1 3811-3889> 47 -1 4D

Note : Number of TMT Bars, length & weight may be differ as per the market demand.

Technology:

The TMT Bars at Alaknanda Sponge Iron Ltd. is produced using the world renowned Temcore Technology. The Temcore process is widely accepted as the best process for production of high quality rebars since the technology uses low cost raw materials against costly alloy elements like Vanadium and Niobium. This process is used under licence from Centre de Recherche Metallurgiques (CRM), Belgium. The temcore process imparts high strength to the bar through thermo mechanical treatment technique. As a result of the latest tempcore technology, ensuring excellent weldability, ductility and bendability a notable saving in alloy cost per ton.

The process involves heating of steel billets in a Reheating Furnace and rolling them through a sequence of rolling stands which progressively reduce the billet to the final size and shape of the reinforcing bar. As the bars leave the final mill stand, they are submitted to a special heat treatment involving three stages.

i) Quenching Stage:

The first stage consists of a water spray cooling treatment to the hot rolled bars. The effectiveness of the water spraying equipment at this stage is critical as to rapidly harden the surface layer, faster than the critical rate, to form the martensite while core remains austenite.

ii) Tempering Stage:

In the second stage the bar leaves the water quenching line and is expoed to air. The heat flux from the still hot core reheats the surface by conduction thus self tempering the surface to a structure called "Tempered Martensite" which is strong and tough. The core is still austenitic at this stage.

iii) Cooling Stage:

The third stage of "Atmospheric Cooling" occurs on the cooling bed, where the austenitic core is transformed to a ductile ferrite pearlite core. The final structure consists of a combination of a strong outer layer of tempered martensite and a ductile core of ferrite pearlite.

Kay 2 Steel

The happiest builders...glad architects...and most satisfied customers are all very well familiar with Kay2 who have been providing the best, perfect and most excellent TMT bars across the nation. Expert technical know how, consumer friendly, superior quality make Kay 2 a pan - Indian brand that is reaching new heights of a rapid pace.

The name Kay2 has been unanimously accepted by everywhere as the most useful steel to fulfil the function of building the strongest and the most ideal places. With the most advanced technological as well as excellent quality raw material, Kay2 has served and will always serve you with the maximum diligence, utmost dedication and equalled quality standard meter.

KAY2 Steel
Ideal Quality Standard:

When maximum reinforcement with excellent quality is needed for any construction, the only name that fulfils all the international quality standards is Kay2 Tmt Bar.

Kay2 Group has the most advanced technology...... the purest and excellent quality raw material... and above all the highly qualified and proficient workforce. Kay2 TMT Bar is mass-producing international quality Steel Fe-415, 500 & 500 D bars having the best possible features, and thus has earned a very high name in construction industry. Kay2 TMT Bar has the unparalled quality standards as it uses the highest and purest grade Fe-415, 500 & 500 D with the best strength and the greatest mildness. The other salient features of Kay2 Tmt bar are far better corrosion-resistance, better bond-strength with cement, resistance to fire hazard, excellent ductility, higher fatigue strength, easy work-ability at site.... and definitely better results than BIS Standards, saving of 14-19% steel.....thus greater reinforcement with reduction in construction costs.

The Unimpeachable Manufacturing Process:

Kay2 Tmt is manufactured through advance technology under entirely computer controlled systems and is tested through rigorous laboratory processes to ensure the best with best functionality.

The plant has contemporary and totally automatic PLC based machines, which maintain temperature during the rolling process between 1000 to 11000C. Then the bars pass through specially designed Quenching Box. The red-hot bars are now subjected to sudden and intense cooling. The cooling time and rate depends on the size of bar, controlled by maintaining a desired temperature, Flow rate and temperature of water. The surface gets quenched to form a hard Martensite structure while the inner layer remains comparatively hot and soft Austenite. Finally, the bar is kept on Cooling Bed,where natural air cools it. The temperature gradient between inner hot core and outer layer makes the core reheat the quenched surface.

Salient Features of Kay2 TMT:
  • Excellent Strength
  • Prominent Ribs for Longer life of constructions
  • Earthquake Resistance
  • Corrosion Resistance
  • Fire Resistance
  • Better Wedability
  • Superiour Bensability
  • Higher Elongation
  • Perfect Straightness
  • Consistent Quality as per BIS standards
  • Product Specification
Product Specification:
Chemical Composition for Grade Fe 500 D
Sl. No. Content Percentage
1. Carbon (Maximum) 0.25
2. Sulphur (Maximum) 0.035
3. Phosphorous (Maximum) 0.035
Physical Properties for Grade Fe 500 D
Sl. No. Content Percentage
1. Yield stress (Minimum) 530 N/mm2
2. Elongation (Minimum) 18%
3. Tensile Strength (Minimum) 600 N/mm2
  • Kay2 technical team is equipped with advanced testing facilities to ensure Kay2 Quality Standards.
Kay2 TMT Bar Advantages:

1. Premium Quality Kay2 TMT Bars are made from billets.

2. Excellent quality and surface finish due to premium quality of R/M & latest rolling techniques.

3. Continuous R D an eye on the global Technology Trends to ensure that our customer get the best.

4. Sophisticated labs to check the consistently quality of bars.

5. Strict metallurgical control is maintained at every stage of production, from receipt of R/M to despatch of finished product. The company has a
ssdedicated Quality Assurance Department with a well equipped laboratories & trained Technicians to monitor the process and materials at different points.

6. Our Quality Assurance System in an entire process that keeps upgrading from time to time.