KD Group

 

 


About KD Iron & Steel Co

Produced by using the most advanced and latest technology is our new generation, high-strength ribbed bar- the X Tech TMT bar. The use of Quenching & self Tempering Technology has enabled the production of these high strength re-bars. The bar comes packed with a yield stress ranging from 425 to 550 N/mm2, extra toughness, a high elongation value of 18-25%, ductility, the ability to weld and an excellent ability to bend. Truly, they're bars that have been made with no compromise on strength and ductility, and they will surely give your homes longer life.

Comprehensive Infrastructure

Re Heating Furnace Speed Rolling Mill TMT plant Strip Mill Section of the Rolling Mill MS Pipe unit Galvanizing unit. The capacity of a TMT Bar, and Coiler plant, depends on the size of the reheating furnace and the speed of the TMT Mill Speed per sec. The speed of the TMT Mill depends on the mm size, weight of the TMT Bar.


K.D. Iron and Steel Offers A Growing Range of First Class Steel Products

TMT Re-Bars

Wire Rods

Billets

 

PRODUCT MIX

K.D Iron & Steel Co. is the only company in the private sector offering the widest range of construction steel. Its range of TMT Re- bars suffices the rarest need of a Civil engineer. The products offered are:

TMT Re- Inforcement Bars

TMT Re- bars Fe 415/Fe 415D/ Fe 500/ Fe 500D

8

10

12

16

20

25

28

32

36

40

Wire Rods

 Rounds

10

12

16

20

Billets

100

X

100

 

 

GRADES

Re-bars – Thermo Mechanically treated (TMT) Re-Inforcement Bars as per IS 1786 Fe 415/415D, Fe 500/500D, Re-bars.

Round - Mild steel as per IS 2062:2006

Billets – IS 2830

     

 

Fe 415/415D

Chemical Properties

Description

IS:1786

Fe 415

X Tech

415 TMT RE-bars

IS:1786

Fe 415D

X Tech 415 D

TMT Re-bars

Carbon [%min]

0.30

0.25

0.25

0.22

Sulphur & Phosphorous [%max]

0.060

0.050

0.045

0.040

S+P[%max]

0.11

0.10

0.085

0.080

Mn[%max]

-

0.60

-

0.070

CE[%max]

-

0.40

-

0.35

Nitrogen [ppm max]

-

-

0.012

0.012

 

Tech TMT RE-BARS are more economic

The X Tech TMT RE-BARS are more economic than other products in the market. As The X Tech TMT RE-BARS have dimension Tolerance which ensures higher meter age per unit weight.

High Strength for critical applications

The X Tech TMT RE-BARS Fe 500/500 D is a special grade of TMT Re-bars produced under specific process conditions resulting in increased tensile strength as compared to Fe 415/415 D grade TMT Re-bars.

Fe 500/500 D Re- bars are ideal for applications in heavy load RCC structures like flyovers,dams,bridges and other critical structures where high yield load is required without compromising on the ductility.

In addition to the features of The X Tech TMT RE-BARS Fe 415/415 D the Fe 500/500D grade Re-bars exhibit the following characteristics:

Special Weldability

The X Tech TMT RE-BARS do not require pre or post welding treatment as they have low carbon content and are produced under controlled thermo mechanical treatment.

Higher corrosion resistance

The controlled thermo mechanical treatment also results in a uniform and thick tempered martensitic rim, completely free from internal stress. This martesitic rim[thicker than Fe 415/415D] improves the corrosion resistance as well as fatigue strength of The X Tech TMT RE-BARS Fe 500/500D when compared to other Re-bars.

 

Fe 500/500 D

 Properties

Description

IS:1786

Fe 500

X TECH 500 TMT

Re-bars

IS:1786 Fe 500D

X TECH 500 D TMT Re-bars

0.2% Proof Stress[min N/mm 2]

500

540

500

560

Ultimate Tensile Strength [min N/mm 2 ]

545

640

565

660

Total Elongation

-

-

5

6

% Elongation,min

12

18

16

20

Bend

4D to 5D

3D to 4D

3D to 4D

2D to 3D

Rebend

5D to 7D

4D to 6D

4D to 6D

3D to 5D

Carbon[% max]

0.3

0.25

0.25

0.22

Phosphorous & Sulphur[%max]

0.055

0.05

0.04

0.035

Phosphorous + Sulphur[%max]

0.105

0.095

0.075

0.065

Mn[%max]

-

0.6

-

0.08

CE[%max]

-

0.4

-

0.35

Nitrogen [ppm max]

-

120

0.012

0.012

 

The gauge length for ASTM Standard is 200mm whereas for BS and Indian standards is 5D.

*fy values for Fe 415/415 D is 415 N/mm 2 and 500 N/mm 2 for Fe 500 / 500 d TMT Re-bars.

By using X TECH TMT RE-BARS Fe 500/500D the effective saving would be to the tune of 17%.

 

Corroding Reinforcement Steel (CRS)

The preferred armour for long – life construction

Corrosion of metal is a natural and rapid phenomenon in areas of high humidity, places close to the sea or in areas of humidity, places close to the sea or in the presence of saline water or gaseous emissions in industrial area.

It is a salient and potent menace that can destroy the toughest and best built structures in the world like buildings, bridges, dams, chimneys, jetties, industrial plants, port establishments etc.

When concrete is freshly cast, it contains high ph value [Ph value:12-13]. This creates a protective passive oxide layer over the steel surface, preventing it from corrosion.

Gradually, with constant ingress of oxygen, water, chlorides, carbon-dioxide etc. the ph value of the concrete drops below 8 causing delay of the protective layer. The chloride Ions attack the passive layer on the metal surface exposing it to oxygen and moisture. Once the passive layer is broken the electro – chemical reaction of corrosion progresses unimpended.

The impact of corrosion on steel – reinforced concrete

Any construction of permanent nature requires concrete with steel reinforcement . The durability of concrete depends in its impermeability to water , oxygen , carbon-dioxide, chlorides, sulphates etc which corrodes and weakens the re-inforcement bars leading to spilling of concrete.

Special corrosion resistance

X TECH TMT RE-BARS CRS have been tested in rigorous corrosion media and evaluated for various corrosion resistant properties as per ASTM standards viz. alternate immersion test, salt spray test ,atmospheric exposure test, sulpher dioxide test and potentio dynamic test. The result of such corrosion tests indicate that X TECH TMT RE-BARS CRS have a minimum corrosion resistant index[CRI] of 1.7 as compared to CRI of other TMT RE BARS CRS show an available in the market.

Certification

X TECH TMT RE-BARS CRS have been tested at a number of reputed national institutes like IIT Guwahati and National Test House, Guwahati under actual service conditions. The field data obtained in actual service condition demonstrates its durability compared to the other TMT Re- bars.

More Value for your Money

 BIS Certified and of superior quality. X Tech TMT RE-BARS Fe 415/415 D is high strength thermo mechanically treated Re-inforcement bars. They are produced under controlled and consistent conditions and are recognised as market leaders in this segment.

FEATURES :

Superior Physical Strength

X Tech TMT RE-BARS Fe 425/415 D exhibit consistent superior strength and high ductility with much higher limits than specified in IS:1786 which ensures superior structures.

High Dimension Tolerance

X Tech TMT RE-BARS have section weights very close to the nominal values specified in BIS code. This ensures higher meter age per unit weight of Re-bars as compared to ordinary Re-Bars.

Seismic Resistance

X Tech TMT RE-BARS support Seismic design due to its unique combination of strength, ductility and stress ratio.

Controlled Chemical Composition

X Tech TMT RE-BARS are hot rolled from K.D. Iron & Steel Co`s group company B.R. Metallic's Billets which have uniform chemical composition like low carbon content and high manganese content.

High Bond Strength

X Tech TMT RE-BARS have more prominent ribs in the form of x and thus have higher AR values up to 100-150% higher than traditional CTD bars or other TMT Re- b ars.

Fire Resistance

X Tech TMT RE-BARS suffers no loss of strength even at temp as high as 600`C

Unique Corrosion Resistance

X Tech TMT RE-BARS are free from internal stress , which result in superior corrosion resistant characteristics compared to the traditionally cold-twisted bars and other TMT Re- bars.

Superior Bendability

X Tech TMT RE-BARS are manufactured by the advanced Turboquench Process, which results in a tough outer surface and a soft core. This provides the Re- bars good bendability and workability.

Excellent Weldability

X Tech TMT RE-BARS have low carbon content , are highly weldable , in comparison to ordinary Re- bars and require no pre or post welding treatment.

PROPERTIES

 

INTERNATIONAL QUALITY STANDARDS

X Tech TMT are manufactured conforming to various international standards, viz. IS:1786 Grade Fe415/ Fe500/ Fe550 of BIS of India , ASTM A615 Grade 60 of the USA , BST 500 of DIN 488 of Germany , BS 444 Grade 460 of Great Britain, among others.

RE-BARS PROFILE

  • X Tech TMT has quality and technology as prime growth parameters.
  • Along with high-end Franchisee production units KD Steel and Iron produces HSD Bars such as TMT and CTD.
  • With high ductility X Tech TMT bars are best equipped to resist earthquakes of high impact.
  • X Tech TMT brand HSD bars are being manufactured by most advanced German technology.