Birla TMT Fe 550D TMT Bar Birla Fe 550D TMT Bar - 10 mm is a thermo-mechanically treated high-strength reinforcing bar conforming to IS 1786:2008, with a 10 mm nominal diameter supplied in standard 12 m lengths. Manufactured using the quench-and-self-temper (QST) process, it achieves a minimum yield strength of 550 MPa, UTS of 600 MPa, and elongation of 14.5%, making it reliable for seismic-resistant ductile frame and critical structural concrete applications. The hard martensitic outer rim and tough ferritic-pearlitic core give this bar its signature combination of strength, ductility, and superior bond performance in reinforced concrete.

• Thermomechanically treated to IS 1786:2008 Fe 550D with mill test certification
• Minimum yield strength 550 MPa and UTS 600 MPa for high-strength ductile design
• Enhanced 14.5% elongation combining high strength with superior ductile response
• QST microstructure controlled for ductile frame requirements at 550 MPa grade
• Ribbed surface profile ensuring maximum mechanical bond with structural concrete
• Low impurity content for improved weldability and cold-bending performance
• Standard 12 m lengths supporting efficient rebar scheduling and site logistics
• Preferred grade for seismic zone high-rise and critical structural RCC elements
• Compatible with standard mechanical coupler and IS-compliant splice systems
• Supports high-strength seismic design with controlled ductility and elongation

• Seismic-resistant high-strength ductile frame column reinforcement
• High-rise seismic zone shear wall and coupled wall system reinforcement
• Critical joint and hinge zones in high-strength ductile RC frames
• Earthquake-resistant hospital, school, and lifeline building structures
• Seismic zone high-rise primary column and beam reinforcement members
• Long-span bridge structures in seismic corridors requiring ductility
• Seismically designed pile and pile cap reinforcement in zone III/IV/V
• High-strength seismic RCC cores in super-tall and slender tower buildings