The Birla TMT Grade Fe 550D TMT Bar Birla Fe 550D TMT Bar - 8 mm is a thermomechanically treated reinforcing steel bar conforming to IS 1786:2008 specifications, offered in 8 mm diameter with standard 12 m lengths. With guaranteed mechanical properties of 550 MPa yield, 600 MPa tensile, and 14.5% elongation, this TMT bar delivers dependable structural performance for seismic-resistant ductile frame and critical structural concrete applications. Its enhanced rib geometry ensures superior bond strength with concrete while its controlled chemical composition supports field welding and bending without loss of structural integrity.

• Fe 550D IS 1786:2008 certified TMT bar with high yield and enhanced elongation
• Thermomechanical treatment producing hard rim/ductile core at 550 MPa strength
• Yield 550 MPa and UTS 600 MPa with 14.5% elongation for seismic zone design
• Superior ductility versus Fe 550 for controlled plastic deformation in seismic events
• Ribbed bar geometry for full composite action between steel and concrete
• Site-weldable using standard IS 1786-compliant chemical composition procedures
• Supports performance-based seismic design requiring both strength and ductility
• Standard 12 m lengths for efficient procurement, scheduling, and site logistics
• Enables optimised reinforcement in seismic-critical high-strength RCC elements
• Ideal for high-rise columns, shear walls, and earthquake-resistant frame structures

• High-strength seismic frame beams and columns in zone IV/V buildings
• Earthquake-resistant RC shear walls and core walls in tall towers
• High-rise podium transfer plate and transfer beam primary reinforcement
• Seismically designed long-span bridge deck and girder reinforcement
• Special moment frame members in seismic zone critical facility buildings
• High-strength pile cage reinforcement in deep foundation seismic systems
• Heavily loaded industrial high-rise structures in seismic hazard regions
• Performance-critical nuclear, defence, and lifeline infrastructure RCC