JINDAL PANTHER Fe 550D is a TMT rebar produced by the HYQST/QST process at Jindal Steel and Power's own mills. The brochure positions it as the strongest grade of TMT rebar in practice, with higher strength and higher ductility that suit earthquake-resistant structures. It is offered in a 6 mm - 40 mm range and is stated to offer 32 % higher strength than conventional Fe 415 steel (415 MPa vs 550 MPa).

Key features

• Iron-ore based steel with modern ladle refining
• Controlled chemistry (P+S < 0.075 %)
• Made by HYQST (Patratu) / QST (Angul) thermo-mechanical treatment: hard tempered-martensite surface with soft ferrite-pearlite core
• Precise, uniform parallel rib pattern for bond strength with concrete
• Panther face embossing on the bar and ISI mark with licence number
• Low alloying route with low carbon keeps the steel ductile and weldable
• 32 % higher strength than conventional steel (415 MPa vs 550 MPa)
• Designing structures with Fe 550D reduces steel consumption by 12-15 % (subject to design)
• minimum 5 % saving on steel (subject to design)
• Fewer / thinner bars means less congestion, less labour and faster construction
• Usable in marine, coastal and saline conditions and high seismic zones

Applications

• Modern tall buildings and high-rise structures
• Long-span structures
• Ports
• Airports
• Rail and metro networks
• Bridges
• Earthquake-resistant structures
• Marine, coastal and saline environments
• Refineries, power plants, roads and dams

Specifications

Grade: Fe 550D | Diameter Range: 6 mm - 40 mm | Yield Strength (Min): 550 MPa | Ultimate Tensile Strength (Min): 600 MPa | Elongation (Min): 16 % | UTS/YS Ratio (Min): 1.10 | Jindal Panther Yield Stress (Min): 575 N/mm2 | Jindal Panther Tensile Strength (Min): 645 N/mm2 | Jindal Panther Elongation (Min): 18 % | Jindal Panther UTS/YS Ratio (Min): 1.15 | Actual Yield Strength (typical test, as stated): 575 MPa | Actual Elongation (typical test, as stated): 21.75 % | Carbon: 0.22 - 0.25 % | Silicon: 0.15 - 0.25 % | Manganese: 0.95 - 1.05 % | Sulphur (Max): 0.030 % | Phosphorus (Max): 0.030 % | Sulphur + Phosphorus (Max): 0.055 % | Carbon Equivalent (CE): 0.35 - 0.41 | BIS Fe 550D Reference Limits: C 0.25 %, S 0.040 %, P 0.040 %, S+P 0.075 %, CE 0.61, YS 550 N/mm2, UTS 600 N/mm2, Elongation 14.5 %, UTS/YS 1.08 | Martensite Zone: depth 20 - 25 % of dia, hardness 250 - 270 HV | Transition Zone (Bainite): depth 2 - 5 % of dia, hardness 200 - 220 HV | Ferrite + Pearlite Core: hardness 170 - 190 HV | Manufacturing Process: HYQST (Patratu mill, Morgan USA) / QST (Angul mill, SMS Meer Germany)

Standards: IS 1786 (Fe 550D grade compliant) | BIS IS 1786 (Angul bar mill) | UK CARES BS 4449 (Angul bar mill) | Hong Kong CS2 (Angul bar mill) | Singapore SS 560 (Angul bar mill) | AS/NZS 4671 (Angul bar mill) | ISO 9001:2015 | ISO 14001:2015 | ISO 45001:2018