The Indostar Fe 550D TMT Bar - 20 mm is a heavy-section 20 mm Fe 550D TMT deformed reinforcement bar produced by Indostar to IS 1786:2008 (High Strength Deformed Steel Bars and Wires for Concrete Reinforcement). The Fe 550D designation confirms this bar meets the dual requirement of 550 MPa minimum yield strength and 14.5% minimum elongation — 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. In 12 m standard lengths, the 20 mm ribbed bar is designed for main column bars, heavy beam reinforcement, pile cap reinforcement, and medium-load foundations, delivering high strength with enhanced ductility (D-grade) for superior seismic performance and safe structural behaviour across all bar diameters and ensuring compliant behaviour under the seismic demands of IS 13920 ductile detailing requirements.

• Certified Fe 550D TMT high-strength deformed bar — IS 1786:2008 with IS mark assurance
• Dual performance: 550 MPa strength + 14.5% ductility — unavailable in standard Fe 550
• 20 mm ribbed bar in 12 m: consistent diameter, rib pattern, and straightness throughout length
• Thermo-Mechanical Treatment: hard outer ring for strength, ductile inner core for toughness and bendability
• Elongation ≥ 14.5%: superior plastic deformation before fracture — mandatory for seismic zones
• High bond strength with all concrete grades — deformed ribs meet IS 1786:2008 dimensional requirements
• Suitable for lap splice, mechanical coupling, and butt welding with standard qualified procedures
• Reduced carbon content provides improved corrosion resistance in reinforced concrete environments
• Seismic-compliant: simultaneously meets UTS/YS and elongation requirements of IS 13920:2016
• Full quality documentation: heat number, grade, size, mechanical properties, and IS MTC available

• Residential apartments, villas, and row-house column, beam, and slab reinforcement
• Commercial office, retail mall, and hotel structural RCC frame reinforcement
• Road and highway culverts, underpasses, and grade-separated junction RCC works
• Irrigation barrages, canal headworks, and water distribution infrastructure concrete
• General civil engineering: drains, pavement slabs, compound walls, and boundary structures
• Heavy prefabricated RCC products requiring ductile, high-strength rebar throughout
• Government infrastructure projects requiring IS 1786:2008 Fe 550D certified materials