The Indostar Fe 550D TMT Bar - 32 mm manufactured by Indostar is a large-diameter 32 mm Fe 550D Thermo-Mechanically Treated deformed rebar, the highest performance rebar conforming to IS 1786:2008 (High Strength Deformed Steel Bars and Wires for Concrete Reinforcement). The Fe 550D grade represents the pinnacle of standard TMT rebar specification — delivering 550 MPa minimum yield, 600 MPa tensile, and 14.5% minimum elongation for heavy-duty, high-load, and seismic-critical reinforced concrete applications. In 12 m standard lengths, this 32 mm IS-marked bar is the engineering choice for large-diameter column primary bars, heavy raft foundation mats, bridge pier reinforcement, and industrial heavy-load structures, where both extreme load capacity and seismic ductility are simultaneously required for safe, code-compliant reinforced concrete design.

• Produced to IS 1786:2008 D-grade: yield 550 MPa, tensile 600 MPa, elongation 14.5%
• Fe 550D: uniquely combines 550 MPa yield strength with 14.5% elongation — standard Fe 550 only achieves 10%
• Bar size 32 mm in 12 m lengths — accurate weight per metre for precise bill of quantities planning
• TMT quench-and-self-temper process: superior to CTD bars — no residual stress, higher fatigue life
• UTS/YS ratio 1.08: mandatory safety reserve for reliable plastic hinge formation under seismic loads
• Re-bendable without cracking: verified by IS 1786 mandrel re-bend test for on-site flexibility
• Consistent deformed surface geometry: rib height, spacing, and angle per IS 1786:2008 tolerances
• Joinable by lap splice, mechanical coupler, or butt weld — standard site procedures applicable
• Good corrosion resistance from TMT surface layer — reduced section loss in moderately aggressive environments
• Bundled and tagged with heat number, grade, and diameter for complete site traceability

• Multi-storey residential and commercial RCC building slabs, beams, and columns
• Flyover, elevated road, and highway overpass structural concrete reinforcement
• Port and harbour structures: jetty decks, berth slabs, and marine concrete piles
• Hydropower dam structures, spillway slabs, and hydraulic concrete reinforcement
• Precast structural elements: columns, beams, hollow-core slabs, and staircase units
• Coastal and aggressive environment structures requiring enhanced ductile reinforcement
• Sports stadiums, convention centres, and large public infrastructure concrete structures