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Pre-stressed steel strand, when stressed and embedded in concrete, loses the applied stress exponentially as time passes. The loss of stress is one of the important factors in the design of pre-stressed concrete structures. TATA Wiron PC Strands are treated by the stabilisation process, which is the most widely accepted method throughout the world.

Bare PC Strands are used in pre-stressing of concrete for construction of various types of structures (road, river & railway bridges and flyovers, atomic reactor domes, slabs, silos, hangers, aqueducts, high-rise buildings, viaducts and railway sleepers).

International Specification Indian Specification
ASTM A 416 IS 14268 (Low Relaxation Strand)
BS 5896 IS 6006 (Normal Relaxation Strand)
JIS 3536  
AS 1311  
EN 10138  
AS NZS 4672  

Any other International Specification and as per customer requirements

  • Brings down the amount of steel required by 10%.
  • Reduces project cost by decreasing the number of anchorages, sheathings, wedges and labour.
  • Lowers the concrete requirement due to reduced size of structural members.
  • Eliminates the necessity of extra post straightening treatment with thermo-mechanical processing.

National Highways Authority of India • Railways • Public Health Department ( PWD)
Nuclear Power Corporation of India Ltd • Metro Rail Corporations • NTPC

Major infrastructure projects in India have used PC Strands manufactured by Tata Wiron.

Rail & Metros Bridges Road Others
  • Mumbai Metro
  • Delhi Metro
  • Kolkata Metro
  • Bangalore Metro
  • Jaipur Metro
  • Konkan Railway
  • Hyderabad Metro
  • Various bridges over rivers such as: Ganga, New Brahmaputra, Narmada, and Kosi
  • Bandra Worli Sea Link
  • Agra-Lucknow Road
  • Mumbai-Pune Expressway
  • Mumbai-Nasik Road
  • Mumbai-Ahmedabad Road
  • All nuclear reactors
  • 95% LNG and Ethylene tanks
  • Various dams

We source our raw materials from our mines and steel-making facilities to ensure quality of our products. Our strand manufacturing plants are certified with ISO 9001:2008 for Quality Management Systems and the testing laboratories are accredited to ISO/IEC 17025 by NABL- the open accreditation body of India.

The strand is manufactured to meet all national and international standards - IS14268, BS 5896, ASTM A416/416M, AS/NZS 4672, AS NZS 4672, JIS3536 & EN-10138-3. The size range is: 9.30 mm to 15.70 mm.

  • Manufactured under BIS license against IS 14268
  • Approved by Dubai Central Laboratory (DCL)
  • Approved by Nuclear Power Corporation of India Ltd (NPCIL) for use in Atomic Reactors