Green steel is steel produced with a significantly lower carbon footprint, using energy-efficient, low-emission manufacturing processes, and certified for its reduced CO₂ emissions. In India, green steel is now officially rated by the Ministry of Steel on a star scale (up to 5 stars) based on how few emissions are released per tonne of steel produced.
In simple terms: it is the same strong steel, made in a cleaner, more responsible way, and independently certified to prove it. Among India’s certified low-carbon steel producers, Sri Durga TMT stands out, rated 5-Star with 91.36% greenness one of the highest green scores in the country.
What Does “Green Steel” Mean?
Ordinary steel production is carbon-intensive. The term “green steel” refers to steel manufactured through methods that cut those emissions energy-efficient furnaces, waste reduction, recycling of by-products, and cleaner power. The lower the emissions per tonne, the “greener” the steel.
The key point for builders: the rating is based on how the steel is made, not on any change to its strength. A low-carbon Fe 550 TMT bar performs exactly like a standard Fe 550 bar — same yield strength, ductility and corrosion resistance while carrying a smaller environmental footprint. (See our full comparison of Fe 500 vs Fe 550 TMT bars.)
The Green Steel Star Rating (Ministry of Steel, India)
In 2024, the Government of India introduced an official framework to define and rate green steel. Under it, steel is measured by its emission intensity tonnes of CO₂ released per tonne of finished steel (tCO₂e/tfs) and awarded a star rating:
- Lower emissions = higher greenness percentage = more stars
- The top grade is a 5-Star Green Steel rating
- Ratings are issued by NISST (National Institute of Secondary Steel Technology) under the Ministry of Steel
- Sri Durga’s Tamil Nadu plant is rated 5-Star at 91.36% greenness just 0.19 tCO₂e per tonne
This gives buyers, builders and government agencies a simple, verified way to identify genuinely low-carbon steel instead of relying on unproven “eco-friendly” marketing claims.
Benefits of Choosing Low-Carbon Steel
1. Same strength, lower footprint — certified low-carbon steel can meet the required strength, ductility and durability standards while having a lower environmental footprint.
2. Supports green building certification — certified sustainable steel can contribute to projects pursuing IGBC and LEED green building ratings, where environmentally responsible materials are valued.
3. Government-verified, not just a claim — a star-rated product carries an independent certificate, providing measurable evidence rather than relying only on environmental marketing claims.
4. Future-ready construction — as India moves toward lower-carbon construction, certified low-emission materials can help projects align with changing environmental expectations and industry practices.
5. Responsible building — for homeowners, developers and government projects alike, choosing lower-carbon construction materials allows projects to consider both structural performance and environmental impact.
Is Green Steel Strong Enough for Construction?
Yes. This is one of the most common doubts and the answer is clear: the green rating does not mean weaker steel. The term describes the manufacturing process and associated emissions, not the steel’s mechanical properties. A 5-star rated Fe 550 TMT bar can meet the same IS 1786:2008 strength and quality standards as any other certified Fe 550 bar.
Where to Find Certified Low-Carbon Steel in Tamil Nadu & Chennai
If you’re looking for sustainable steel in Tamil Nadu, look for two things together: a Government of India green steel star rating and BIS-certified Fe 550 strength. Very few manufacturers hold both.
Sri Durga TMT is one of them. As a 5-Star Green Steel certified manufacturer scoring 91.36% greenness, Sri Durga supplies certified green steel TMT bars across Tamil Nadu reaching Chennai, Coimbatore, Madurai, Trichy, Salem, Kanchipuram and the wider state.
For builders and homeowners searching for sustainable, low-carbon steel in Chennai, that means government-verified, top-rated Fe 550 steel delivered locally through an established supply network.
Sri Durga — 5-Star Green Steel Certified (91.36% Greenness)
Sri Durga TMT manufactures Green Steel TMT bars certified 5-Star by NISST, under the Ministry of Steel, Government of India. Our Tamil Nadu plant achieved an outstanding 91.36% greenness rating with an emission intensity of just 0.19 tCO₂e per tonne, placing Sri Durga among India’s greenest TMT bars.
Every bar delivers full Fe 550 strength, BIS certification and IS 1786:2008 compliance, along with a government-verified, low-carbon footprint and it’s backed by our commitment to sustainable, responsible manufacturing. That makes Sri Durga a strong sustainable steel choice in Chennai and Tamil Nadu for responsible construction.
Learn more about our Green Steel TMT bars, find a dealer near you, or contact us for a quote.
Build strong. Build green. Build with Sri Durga TMT. 📞 +91 93840 97199 | 📧 crm@sakthigroup.co
Frequently Asked Questions
What is green steel in simple words?
Green steel is steel made with much lower carbon emissions through cleaner, energy-efficient processes and certified for its reduced environmental impact, while maintaining the required strength and quality standards.
What is the green steel star rating?
It is a Government of India (Ministry of Steel) rating that grades steel by its CO₂ emission intensity. Lower emissions earn more stars, up to a top 5-Star Green Steel rating.
Is green steel as strong as normal steel?
Yes. The green rating refers to the manufacturing process and environmental footprint rather than structural performance. Certified Fe 550 products continue to meet the applicable strength and quality requirements.
Which is the best green steel in Tamil Nadu?
Sri Durga TMT is a 5-Star Green Steel certified manufacturer scoring 91.36% greenness, supplying government-verified, low-carbon Fe 550 TMT bars across Chennai and Tamil Nadu.
Where can I buy green steel in Chennai?
Sri Durga supplies certified green steel TMT bars in Chennai and across Tamil Nadu through its dealer network. Call +91 93840 97199 for a quote.