Secondary Aluminium in India: Why the Scrap Route Has a 10-Fold CBAM Advantage and How to Build the Business Case
Secondary aluminium from scrap has embedded emissions of approximately 0.5 to 0.8 tCO₂/t — compared to 12 to 18 tCO₂/t for Indian coal-based primary production. Under CBAM, this difference is worth approximately €900 to €1,400 per tonne on EU exports. India’s secondary sector is dramatically under-invested relative to this opportunity. This analysis explains why.
Key Takeaways
- Secondary aluminium is produced by melting and refining aluminium scrap — end-of-life vehicles, beverage cans, building window frames, industrial scrap from machining operations — rather than by the electrolytic reduction of alumina (the Hall-Héroult process). The energy required to melt and refine scrap is approximately 5 to 10 percent of the energy required to produce primary aluminium from bauxite. This dramatic energy reduction translates directly into a dramatic emission reduction.
- India’s secondary aluminium sector is estimated to produce approximately 2 to 2.5 million tonnes per year — a significant volume, but fragmented across thousands of small melting units rather than consolidated into efficient, CBAM-documentable large-scale operations. The typical secondary aluminium producer in India operates at 5,000 to 50,000 tonnes per year, lacks the monitoring and verification infrastructure to generate CBAM-compliant embedded emission data, and has not historically been integrated into the formal supply chains of EU-facing aluminium users.
- The CBAM anti-circumvention rule for aluminium — introduced under the Omnibus package and applying from January 2026 — requires that pre-consumer scrap embedded emissions reflect the actual emission intensity of the production process from which the scrap was generated. This rule is specifically designed to prevent secondary producers from claiming zero embedded emissions when their input scrap comes from high-carbon primary production lines. Post-consumer scrap (end-of-life scrap collected from the market) is not subject to this rule and defaults to a low embedded emission assumption.
- India generates approximately 1 to 1.5 million tonnes of post-consumer aluminium scrap per year from three primary streams — automotive (end-of-life vehicles), beverage cans and packaging, and building and construction demolition. India also generates approximately 0.5 to 0.8 million tonnes of pre-consumer industrial machining and fabrication scrap annually. Combined scrap availability is approximately 1.5 to 2.3 million tonnes per year and growing at approximately 7 to 10 percent annually as the installed stock of aluminium in India’s economy matures. This growth trajectory will make secondary aluminium increasingly important to India’s aluminium supply balance through the 2030s.
- The CBAM economic advantage of secondary aluminium is so large that it changes the competitive dynamics for EU-facing aluminium supply chains. European auto manufacturers and packaging companies are increasingly mandating minimum recycled content targets in their aluminium procurement — 25 to 50 percent recycled content in automotive aluminium sheet, for example — driven partly by their own Scope 3 emission reduction commitments. A well-structured, formally documented Indian secondary aluminium producer meeting post-consumer scrap input requirements is a genuinely differentiated supplier relative to primary coal-based smelters for these EU customer procurement programmes.
- The capital cost of a modern secondary aluminium facility at 50,000 tonnes per year is approximately Rs 150 to 250 crore — dramatically lower than the Rs 2,000 to 5,000 crore required for equivalent primary aluminium capacity expansion. This lower capital cost, combined with the CBAM economics, lower electricity consumption (5 to 10 percent of primary), and increasing scrap availability, makes secondary aluminium one of the most capital-efficient decarbonisation investments available in the Indian aluminium sector.
India’s aluminium industry narrative is almost entirely focused on primary production — the integrated smelting operations of Vedanta, Hindalco, NALCO, and BALCO that collectively represent India’s significant position in global primary aluminium. This focus is understandable from a production volume perspective. But from a CBAM economics perspective, it creates a structural blind spot. The secondary aluminium sector — scrap-based melting and refining — has an emission intensity that is 10 to 15 times lower than India’s coal-based primary and a capital cost that is a fraction of new primary capacity. Its CBAM economics are categorically different from those of any primary smelter. And it receives almost no analytical attention from either the industry or from India’s CBAM policy response.
This article is designed to fill that gap. It maps the emission intensity of secondary aluminium production relative to primary, calculates the CBAM cost advantage in financial terms, assesses India’s scrap supply situation and its trajectory, explains the anti-circumvention rule that affects pre-consumer scrap, and makes the investment case for formalised secondary aluminium operations with CBAM-compliant documentation.
The embedded emission comparison: why secondary is categorically different
Primary Aluminium (coal CPP, Hall-Héroult): Scope 1 anode combustion + PFC: ~1.8–2.2 tCO₂/t Scope 2 (14,500 kWh/t × CPP EF 1.0 tCO₂/MWh): ~14.5 tCO₂/t Embedded emissions from alumina: ~0.3 tCO₂/t (calcination in refinery) Total: ~16.6–17.0 tCO₂/t aluminium
Ratio: ~29–35× more embedded emissions in coal-based primary vs secondary CBAM certificate gap at €80/tCO₂e: (16.6 − 0.5) × 80 = €1,288/t
The formula makes the scale of the difference visible. Secondary aluminium at 0.43 to 0.58 tCO₂/t and coal-based primary at approximately 16.6 to 17 tCO₂/t are not on the same carbon market. They are not even in the same order of magnitude. An EU importer buying the same tonne of aluminium alloy — identically specified, identically performing — faces a CBAM certificate cost difference of approximately €1,288/t between sourcing from an Indian coal-based smelter versus an Indian secondary producer using post-consumer scrap. On a commodity worth approximately €2,200/t, that €1,288 difference represents 58 percent of the product’s market value. No commercial negotiation can bridge that gap. It is a structural reorientation of the supply chain.
Coal-Based Primary Aluminium — CBAM Position
Secondary Aluminium (Post-Consumer Scrap) — CBAM Position
The anti-circumvention rule: pre-consumer vs post-consumer scrap
The CBAM Omnibus package of 2025 introduced an anti-circumvention provision specifically for secondary aluminium producers. The concern was straightforward: a secondary producer using scrap purchased from a coal-based primary smelter’s internal process waste — machining chips, dross, off-specification castings — could claim near-zero embedded emissions for its output while in reality its scrap input originated from the most carbon-intensive production process in the sector. The anti-circumvention rule closes this by requiring that pre-consumer scrap — process waste generated within an industrial facility — carries the embedded emission intensity of the original production process from which it came.
Post-consumer scrap — metal collected from end-of-life vehicles, packaging, demolished buildings — is treated differently. Because the original production emission has already been amortised through the use phase of the product, post-consumer scrap defaults to a low or zero embedded emission assumption for CBAM purposes. This asymmetry between pre-consumer and post-consumer scrap is the regulatory design that makes India’s growing post-consumer scrap stream structurally valuable for CBAM-compliant secondary production.
India’s scrap collection infrastructure is the binding constraint — and the investment opportunity. India generates approximately 1 to 1.5 million tonnes of post-consumer aluminium scrap annually, but only a fraction of it is collected, sorted, and processed in a way that generates the documentation chain needed for CBAM-compliant secondary production. The informal scrap trade — which handles a large proportion of India’s end-of-life vehicle, packaging, and construction demolition scrap — does not generate the emission intensity documentation or chain of custody records that a CBAM EU importer needs to substantiate a low-embedded-emission claim. The investment required to formalise India’s scrap collection and processing chain — through registered collection centres, sorted scrap yard operations with material certification, and upstream-documented melting facilities — is the enabling condition for converting India’s growing scrap availability into a CBAM-competitive secondary aluminium export stream.
Frequently Asked Questions
Is secondary aluminium CBAM-covered at the same CN codes as primary aluminium?
Yes. CBAM Annex I does not distinguish between primary and secondary aluminium in its product coverage — it covers aluminium products by CN code regardless of whether the aluminium is primary or secondary in origin. A tonne of aluminium billet produced from scrap and a tonne of aluminium billet produced from primary smelting fall under the same CN code (7604) and both attract CBAM obligations on import into the EU. The difference is in the embedded emissions calculation — which is dramatically lower for secondary — and therefore in the CBAM certificate cost. The classification is the same; the cost is structurally different.
What emission factor should a secondary aluminium producer use for its scrap input under CBAM?
For post-consumer scrap (collected from market), the CBAM Implementing Regulation allows use of a zero or near-zero embedded emission factor for the scrap input, because the production emissions have been allocated to the original product’s use phase. For pre-consumer scrap (process waste from industrial operations), the anti-circumvention rule under the Omnibus package requires use of the actual emission intensity of the original production process. A secondary producer using only post-consumer scrap — documented with collection certificates — can calculate embedded emissions based solely on the melting process’s direct energy consumption, resulting in the very low embedded emission values (0.5 to 0.8 tCO₂/t) that give secondary aluminium its CBAM advantage.
Can a primary aluminium producer reduce CBAM liability by adding scrap to the feed?
Yes — but the reduction is proportional to the scrap charge ratio and is limited by the primary smelter’s process constraints. In a Hall-Héroult primary cell, scrap addition is limited to approximately 10 to 15 percent of the bath by the electrolytic process chemistry. A primary smelter adding 15 percent post-consumer scrap reduces its overall embedded emission by approximately 15 percent of the difference between primary and secondary embedded emissions — approximately 2.4 tCO₂/t at India’s primary emission intensity — which is meaningful but leaves the bulk of the primary emission burden unchanged. The more significant scrap addition opportunity is in the casting and alloying stages after primary smelting, where scrap ratios can be higher and where the embedded emission calculation gives credit for scrap content proportionally.
Sources
- European Aluminium — Secondary aluminium production statistics and embedded emission benchmarks, 2025
- International Aluminium Institute — Global aluminium scrap statistics — India secondary production estimates
- European Commission — CBAM Omnibus package — anti-circumvention rule for pre-consumer scrap, 2025
- CBAM Implementing Regulation 2023/1773 — embedded emission methodology for aluminium, scrap treatment
- Aluminium Association of India — India aluminium sector data — primary and secondary production
Related Reclimatize.in Research
CBAM and Indian Aluminium: Scope 2 Electricity Exposure and What Smelters Must Do CBAM and Indian Aluminium: Why Renewable Electricity Is Now a Trade Competitiveness Question CBAM Product Classification: Which HS Codes Are Covered India’s Climate Finance Taxonomy: Which Industrial Assets Qualify India’s CCTS Explained