Spark Fe 415 TMT Bar Spark Fe 415 TMT Bar - 25 mm is a thermo-mechanically treated high-strength reinforcing bar conforming to IS 1786:2008, with a 25 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 415 MPa, UTS of 485 MPa, and elongation of 14.5%, making it reliable for general construction, residential slabs, and low-rise structural concrete. 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 415 with mill test certification
• Minimum yield strength 415 MPa and UTS 485 MPa for general RCC design
• Minimum elongation 14.5% providing ductile behaviour under load
• Hard martensitic outer rim with tough ferritic-pearlitic core microstructure
• Superior surface rib pattern ensuring strong mechanical bond with concrete
• Low carbon equivalent supporting easy on-site welding and bar bending
• Resistant to corrosion, fire, and thermal cycling in concrete environments
• Standard 12 m mill lengths for efficient scheduling and reduced wastage
• Suitable for cutting, bending, and welding using conventional site equipment
• Compatible with all standard concrete grades used in residential construction

• Residential building foundations, footings, and pile cap reinforcement
• Ground floor and upper floor slabs in low-rise residential construction
• Columns and beams in single and double storey residential buildings
• Compound walls, boundary walls, and plinth beam reinforcement
• Lintels, chajjas, and window sill reinforcement in housing projects
• Small commercial buildings, shops, and ground-plus-one structures
• Agricultural structures, water tanks, and rural infrastructure
• School buildings, community centres, and low-rise government structures