The Indostar Fe 550D TMT Bar - 10 mm from Indostar is a 10 mm TMT high-strength deformed rebar in Fe 550D grade, conforming to IS 1786:2008 (High Strength Deformed Steel Bars and Wires for Concrete Reinforcement). This special ductility-enhanced grade delivers a minimum yield strength of 550 MPa, tensile of 600 MPa, and the superior elongation of 14.5% mandated by the D-designation — Fe 550D uniquely combines 550 MPa yield with significantly higher ductility (14.5% elongation) versus standard Fe 550 (10%), making it the preferred grade for earthquake-resistant and safety-critical reinforced concrete construction. The 10 mm ribbed bar in 12 m lengths is precision-formed for slab distribution bars, stirrups, links, and secondary reinforcement members, offering reliable re-bendability, controlled surface deformation for excellent concrete anchorage, and IS-certified quality for every lot supplied.

• 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 10 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