RD TMTExtra Grip Super ShaktiGet a quote →RD TMTExtra Grip Super Shakti
RD TMT makes BIS certified, GreenPro certified TMT steel bars in Fe 500, Fe 550 and Fe 550D, from 8 mm to 32 mm, at our plant in Mandya, Karnataka. We also make MS billets. Every dispatch comes with a NABL lab test certificate.
RD TMT bars are made to IS 1786:2008 and carry the ISI mark. The bar is quenched with water as it leaves the rolling mill. This gives it a hard outer layer for strength and a soft core for bending. We sell to builders, contractors, dealers and government projects across Karnataka and South India.
Our Fe 550 TMT bars carry the CII GreenPro Ecolabel, in all seven sizes from 8 mm to 32 mm. They are BIS certified with the ISI mark and rated 5-star Green Steel by the Ministry of Steel. Every dispatch leaves with a test certificate from our NABL-accredited lab.
CII GreenPro EcolabelOne certificate for each size we roll, 8 mm to 32 mm. It is the document green-rated (IGBC) building projects ask a steel supplier for.
GPRDT496001 to GPRDT496007 · Valid till Dec 2027The licence that lets RD TMT put the ISI mark on its TMT bars.
CM/L-6200193709Rated 5 star for low carbon emissions: 0.63 tCO2e per tonne.
5.0 star · 71.22% greennessOur in-plant lab is NABL accredited to ISO/IEC 17025:2017. Every lot is tested there before it leaves.
NABLT0826KA18884Green product certification for RD TMT Fe 550 bars, 8 to 32 mm
ISI mark for high strength deformed steel bars
5-star rated, 71.22% green TMT bars
ISO/IEC 17025:2017 · RD TMT quality assurance lab
The roll presses RD TMT and the grade into the steel between the ribs. A site engineer can read it on the bar long after the tag has come off the bundle. The heat number on the tag links the bar to its test certificate.
Six things a structural engineer checks before approving a TMT bar supplier, and how RD TMT bars meet each one.
The bar has a hard outer layer and a soft core. It passes the IS 1786 bend and rebend test in every size from 8 mm to 32 mm.
Fe 550D bars stretch 14.5% before they fail. That is what ductile detailing in a seismic zone needs from the steel.
Low sulphur and phosphorus and a dense outer layer slow down rusting inside the concrete.
Carbon is kept low, so lap and butt welds can be made at site without pre-heating the bar.
TMT bars keep more of their yield strength at 300 to 600°C than cold-twisted bars. That gives people more time to get out.
The ribs are rolled to the same pitch and height on every bar, so the bond with concrete is the same from the first bar to the last.
All three grades are made to IS 1786:2008 in every size from 8 mm to 32 mm. Fe 550 is the grade most of our government approvals name. Fe 550D has the same strength with more elongation, for ductile and seismic design.
Higher yield strength, so a design needs less steel. This is the grade in our GreenPro certificate and in the Tamil Nadu PWD, BDA and KRIDL approvals.
| Grade | Yield min | Elongation min | UTS/YS | Typical use |
|---|---|---|---|---|
| Fe 500 | 500 N/mm² | 12% | ≥ 1.08 | Houses, apartments, general RCC |
| Fe 550 | 550 N/mm² | 10% | ≥ 1.06 | High-rise, heavy load, government works |
| Fe 550D | 550 N/mm² | 14.5% | ≥ 1.08 | Seismic zones, ductile detailing, infrastructure |
Seven sizes, drawn to scale, with the weight per metre from IS 1786 Table 1. That is the number a bar bending schedule is priced on.
We cast mild steel billets in our own plant and sell them to re-rolling mills. The billets are made to IS 14650:1999 under BIS licence CM/L-6200193608. Each heat is checked on a spectrometer before it is cut.
Tell us the grade, the sizes, the tonnage and the site. That is all the sales team needs to quote.
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