Tata Wiron IS 14268 Class 1 Low Relaxation LRPC Strand

Serving india infrastructure demand, Tata Wiron (Tata Steel)’s Tata Wiron IS 14268 Class 1 Low Relaxation LRPC Strand is intended for Indian infrastructure projects that want a strand backed by a fully integrated iron-ore-to-wire supply chain rather than a strand drawn from bought-out rod.

Under IS 14268 (Low Relaxation Strand) tolerances, the available diameters range the standard Class 1 diameter run of 9.5, 11.1, 12.7 and 15.2 mm, hot-stretched on Tata’s SCADA-controlled stabilizing line and tested for relaxation loss under 2.5% after 1,000 hours at 70% of specified minimum breaking strength.

This grade of Tata Wiron IS 14268 Class 1 Low Relaxation LRPC Strand is commonly selected for the Bandra-Worli Sea Link, where Tata Wiron was the sole supplier of prestressed concrete strand for the precast segments, and it remains the benchmark project this brand points to for its cable-stayed bridge experience.

Certification for the Tata Wiron IS 14268 Class 1 Low Relaxation LRPC Strand comes through ISO 9001:2008 certified manufacturing at plants NABL-accredited to ISO/IEC 17025, with independent testing at EMPA Switzerland covering cryogenic tensile strength at –165°C, fatigue performance and one-pin bend behaviour before any coil is released for dispatch.

Handling notes for the Tata Wiron IS 14268 Class 1 Low Relaxation LRPC Strand: cut only with an abrasive disc cutter or shear cutter, never with a flame or welding torch, since heat changes the steel’s microstructure and its mechanical properties. Coils should be unloaded with a crane rather than dropped off the vehicle, stored under cover on a raised platform away from direct ground or water contact, and protected with a vapour phase inhibitor if they will sit on site for an extended period before stressing.