General Info
Application
Low Relaxation PC Stranded wires are used in Pre-stressed concrete girders for road, river & railway bridges and flyovers, Pre-stressed atomic reactor domes, slabs, silos, hangars, aquaducts, high rise buildings, viaducts & railway sleepers.
Quality
- High strength.
- Consistency of physical properties.
- Consistent coil characteristics with uniform winding.
- Close tolerances on unit mass to length ratio.
- Higher breaking loads.
- Higher proof stress loads.
- Higher fatigue and corrosion resistance.
- Better performance at elevated temperature.
- Lower relaxation losses.
Markets
TATA Steel Wire Division is the largest wire manufacturer in the Indian market, catering to pre-stressing strand requirements in the country. Prestigious projects in India include the IT Park (Bangalore), LNG tanks at Dabhol power project, cable stay bridge at Naini, Mumbai Pune Express way and most of the flyovers in Mumbai, Delhi, Bangalore, Chennai and Hyderabad metros are the few places where our strands were used. Wire Division has also been exporting PC Strand to discerning markets across the world and its products are very well established in USA, South East Asia, Middle East, Australia, Europe, etc.
Recent Major Projects Consuming Our Products
India
- Atomic Power projects - Kota, Kaiga and Tarapur.
- Flyovers in Mumbai-JJ Flyover.
- Railway Bridge over Godavari.
- Delhi Metro Rail Project.
- LNG tank at Dahej Port.
- LNG Tanks at Dabhol Power Project.
- Bangalore Software Technology Park.
- Subramany Arcade in Bangalore.
- Cable Stay Bridge at Naini, UP.
Overseas Market
Major Projects include
- Westkon and Dockland Olympic Stadium - Melbourne.
-
South Eastern Motorway Access Bridge - Auckland.
-
Extension Piles - Auckland International Airport.
-
Bank of New Zealand Building - Hamilton.
-
New Zealand's Tallest Tower- Sky Tower, Auckland.
-
Vaiduct from Airport Road to Tampines- Singapore.
-
Bridge across Pandan River - Singapore.
 |
Strict adherence to quality assurance and inspection ensures consistency in properties and renders TATA Wiron PC Strand reliable for critical low relaxation pre-stressing jobs. The Quality process defines controls at every stage right from steel to rod to finished product and includes calibration of testing equipment, training of people for continuous improvements and internal audit of the quality system in line with ISO 9001-2000 Quality assurance facilities at our Borivali plant have been accredited by NABL for compliance to ISO/ IEC 17025:1999
-
Own steel making Own steel making & wire rod rolling to meet specific chemistry and quality requirements.
-
Selection of wire rods of specified chemistry and quality.
-
Quality checks at every stage of production.
-
In-house relaxation testing facility.
-
Strands have been successfully tested at independent laboratories for fatigue under dynamic loads and for tensile.
|
Our PC Strand is approved by EMPA, Switzerland for
-
Cryogenic tensile test at -165°C.
-
Fatigue Test.
-
One-pin Test.
-
Accreditation of Quality Assurance by NABL India which is recognised by NATA of Australia.
-
Certified to ISO 9001:2000 standards.
TATA STEEL Wire Division operates multiple plants for the manufacture of Prestress Concrete Strand, using the latest technology
| International Specification |
Indian Specification |
ASTM A 416
-2000 |
IS 14268 (Low relation Strand) - 1995 |
BS 5896
1980 |
IS 1983 (Normal Relaxation Strand) |
JIS 35 36
-1988 |
|
| AS 1311 |
1987 |
| EN 10138:3:2000 |
|
Any other International Specifications and as per customer requirements |
 |
| 9.3mm |
12.5mm |
15.24mm |
| 9.6mm |
12.7mm |
15.7mm |
| 11.3mm |
12.9mm |
16 mm |
Indian Standard :
The Indian standard for uncoated low relaxation seven ply strand for prestressed concrete is
covered under IS 14268-1995. The properties specified in IS 14268: 1995 are reproduced below:
Indian Standards:IS-14268/1995-CL-1
Typical Load Elongation Curves for Grade 270K Strand
International Standards
Typical Relaxation Curve @ 20C (68F)
|
