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Industry brief · Materials, infrastructure & industry

Aluminiumsmelters, alumina refineries, rolling

Bauxite mining, Bayer alumina refining and Hall-Héroult smelting (13-15 MWh per tonne), plus casthouse and rolling. Power is the decisive input, so smelter projects are effectively power projects. 2026 saw aluminium spike to ~USD 3,660/t (May) after Iranian strikes damaged EGA's Al Taweelah complex and the Strait of Hormuz closure disrupted Gulf supply, while US 50% s232 tariffs and a few greenfield US smelter plans reshape North America; India expands on captive coal power.

Start a Decision Sprint See the parameters
10 swing factors · circle size = months of delay0%20%40%60%1%2%4%6%8%Probability →Cost impact →Long-term power contract unavailable or uncompetitive: 45% likely, 6% cost impact, 12 monthsBauxite residue / environmental approvals (red mud, fluoride emissions): 30% likely, 4% cost impact, 9 monthsRectifier transformers & switchgear lead-time slippage: 40% likely, 4% cost impact, 6 monthsGulf conflict damage / Hormuz shipping disruption to alumina, metal, inputs: 30% likely, 5% cost impact, 6 monthsBauxite/alumina supply & mining licence risk: 30% likely, 3% cost impact, 6 monthsPot start-up / technology performance issues: 25% likely, 3% cost impact, 4 monthsConstruction cost inflation (steel, concrete, labour): 45% likely, 7% cost impact, 3 monthsFinancing cost & credit availability: 35% likely, 4% cost impact, 3 monthsAluminium price/premium collapse before ramp-up: 35% likely, 0% cost impact, 0 monthsTariff/trade-policy reversal (s232, EU safeguards, CBAM): 40% likely, 2% cost impact, 0 monthsConstruction cost inflationLong-term power contract…

Pack v1.0.0 · updated 5 Oct 2026 · 15 cited sources · 14 parameters · 10 swing factors.

At a glance

5,500Capex intensity · USD per tpa aluminium (smelter incl. share of power)range 3,500–9,000 · estimate
42Construction time · monthsrange 30–60 · estimate
25%Mean cost overrunrange 0%–80% · estimate
30%Mean schedule overrunrange 0%–100% · estimate

Pack defaults with their low–high range. Overruns are sector means as a share of the original budget or schedule. All parameters and sources

Sub-industries

Capex intensity ranges by configuration. The unit changes with the asset, so compare within a row, not across rows.

Sub-industryCapex intensityNotes
Primary aluminium smelterPre-bake potlines (400-600 kA cells), carbon/anode plant, casthouse, rectifiers.3,500–6,500USD per tpa aluminium (ex-power)Add USD 1,500-2,500/tpa if captive power plant is included (estimate). Typical smelter 300-720 pots, each ~1 t/day (https://en.wikipedia.org/wiki/Aluminium_smelting).
Alumina refinery (Bayer process)Digestion, clarification, precipitation, calcination; bauxite residue storage.900–2,200USD per tpa aluminaIndia (Lanjigarh, Utkal, NALCO 5th stream) at low end (estimate).
Bauxite miningOpen-cut bauxite; Guinea, Australia, India (Odisha).30–120USD per tpa bauxiteestimate
Captive power for smeltersCoal (India), gas (GCC), hydro (Canada/Norway/Iceland) or renewables+storage.900–3,000USD per kWestimate
Rolling, extrusion & recyclingFRP for cans/auto/aerospace (Novelis, Constellium), extrusions, secondary remelt.1,500–5,000USD per tpaNovelis Bay Minette (US) rolling mill escalated to ~USD 4bn+ (estimate).

Value chain

Inputs

  • bauxite
  • caustic soda
  • alumina
  • calcined petroleum coke & coal-tar pitch (anodes)
  • aluminium fluoride / cryolite
  • electricity (13-15 MWh/t)
  • natural gas/coal (refinery steam, calcination)
  • scrap (secondary)

Process

  • bauxite mining
  • Bayer digestion & calcination
  • anode baking
  • Hall-Héroult electrolysis
  • casting (ingot, billet, slab)
  • hot/cold rolling & extrusion
  • recycling/remelt

Outputs

  • P1020 ingot
  • value-added products (billet, slab, wire rod)
  • flat-rolled products (can sheet, auto sheet)
  • extrusions
  • bauxite residue (red mud)

Parameters

14 parameters: 1 sourced, 13 informed estimates. The bar shows the low–high range with the default marked; estimates are labelled and never presented as observed data.

ParameterDefault & rangeEvidenceSource
Capex intensity(smelter incl. share of power)5,500 USD per tpa aluminiumrange 3,500–9,000estimateas of 5 Oct 2026Informed estimate; no single source
Construction monthsPotline start-up sequence alone takes 6-9 months.42 monthsrange 30–60estimateas of 5 Oct 2026Informed estimate; no single source
Cost overrun meanNo smelter-specific reference class; between Flyvbjerg 2026 mining (27%) and fossil thermal power (18%) (https://arxiv.org/abs/2606.15757).25%range 0%–80%estimateas of 5 Oct 2026Informed estimate; no single source
Schedule overrun mean30%range 0%–100%estimateas of 5 Oct 2026Informed estimate; no single source
Asset life (years)Potlines relined every 5-7 years.40 yearsrange 30–60estimateas of 5 Oct 2026Informed estimate; no single source
WACC10%range 8%–13%estimateas of 5 Oct 2026Informed estimate; no single source
Typical IRR13%range 6%–20%estimateas of 5 Oct 2026Informed estimate; no single source
Utilization92%range 80%–98%estimateas of 5 Oct 2026Informed estimate; no single source
Opex % of revenue78%range 65%–95%estimateas of 5 Oct 2026Informed estimate; no single source
EBITDA marginIndian integrated producers with captive bauxite/power 25-35% at 2026 prices (estimate).20%range 5%–35%estimateas of 5 Oct 2026Informed estimate; no single source
Power intensity MWh per t14 MWh per t Alrange 12.5–15.5estimateas of 5 Oct 2026Informed estimate; no single source
Alumina per t Al1.93 t alumina per t Alrange 1.9–1.96estimateas of 5 Oct 2026Informed estimate; no single source
Smelter scale ktpaEMAL Al Taweelah 1.3 Mtpa is the largest single site.500 ktparange 200–1,300sourcedas of 5 Oct 2026en.wikipedia.org
Pot startup (months)8 monthsrange 5–12estimateas of 5 Oct 2026Informed estimate; no single source

What moves value

Sorted by expected cost (probability × cost impact). Impacts are typical values for the sector; each one is driven by the shared factors listed, which is how one shock reaches several projects at once.

Swing factorProbabilityCost impactSchedule
Construction cost inflation (steel, concrete, labour)Commodity Shared factors: Steel 0.4 · Construction materials 0.3 · Labour 0.3Watch: FRED WPUSI012011; WPU101
45%
7%
3 mo
Long-term power contract unavailable or uncompetitiveCommodity Shared factors: Power price 0.7 · Grid queue 0.3Watch: PPA tenders; industrial power PPI; utility rate cases
45%
6%
12 mo
Rectifier transformers & switchgear lead-time slippageSupply chain Shared factors: Electrical equipment 0.7 · Copper 0.2Watch: transformer backlogs (2-4 years); OEM capacity announcements
40%
4%
6 mo
Gulf conflict damage / Hormuz shipping disruption to alumina, metal, inputsGeopolitical Shared factors: Oil 0.5 · Gas 0.3 · Policy 0.2Watch: Hormuz transits; war-risk premia; Gulf smelter outages
30%
5%
6 mo
Financing cost & credit availabilityFinancing Shared factors: Interest rates 0.8Watch: US 10Y > 5%; DOE/ECA support decisions
35%
4%
3 mo
Bauxite residue / environmental approvals (red mud, fluoride emissions)ESG Shared factors: Policy 0.7Watch: EC conditions; court orders; tailings incidents
30%
4%
9 mo
Bauxite/alumina supply & mining licence riskSupply chain Shared factors: Policy 0.7Watch: Guinea licence actions; Odisha mine auctions
30%
3%
6 mo
Tariff/trade-policy reversal (s232, EU safeguards, CBAM)Regulatory Shared factors: Policy 0.9Watch: s232 proclamations; trade-deal carve-outs (Canada)
40%
2%
0 mo
Pot start-up / technology performance issuesTechnical Shared factors: Labour 0.4 · Electrical equipment 0.3Watch: current efficiency; pot failures; anode effect frequency
25%
3%
4 mo
Aluminium price/premium collapse before ramp-upMarket Shared factors: Aluminium 0.8 · Policy 0.2Watch: LME curve; Midwest premium; China exports
35%
0%
0 mo

Market signals

What moves the case

Key variables with their typical range and what they hit in the model.

VariableTypical rangeAffects
Aluminium price (LME/global)USD 100/t price ≈ 3-4 pp margin for a smelter (estimate).2,100–3,700USD/tRevenue
Regional premium (US Midwest / Rotterdam / Japan)US Midwest premium embeds the 50% s232 tariff.100–1,800USD/tRevenue
Smelter power price+USD 10/MWh ≈ +USD 140/t aluminium cost.25–90USD/MWh (index proxy)Opex
Alumina price~1.93 t alumina per t aluminium.300–800USD/tOpex
Coal price (captive power, India/China)Indian smelters mostly on captive coal power.90–400USD/tOpex
Petcoke/pitch (oil-linked) cost~0.4 t net carbon per t Al (estimate).55–130USD/bbl BrentOpex
Natural gasRefinery steam/calcination and GCC power.2–12USD/MMBtuOpex
US aluminium mill shapes PPIDownstream price pass-through.150–300indexRevenue, Capex
Show 3 more variables
VariableTypical rangeAffects
Smelter margin (price + premium − power − alumina − carbon)Primary margin driver.−300–1,500USD/tRevenue, Opex
EU ETS / CBAMCoal-powered smelting ~15-18 tCO2/t vs hydro ~2-4 (estimate).60–130EUR/tCO2Opex, Revenue
US 10Y TreasuryCapital-intensive; 5.24% in Oct 2026.3–5.5Financing

Price feeds (13)

SeriesSource / idUnitFrequency
Global price of aluminumPALUMUSDMFREDUSD/tmonthly
PPI: aluminum mill shapesWPU102501FREDindexmonthly
PPI: aluminum sheet, plate & foil manufacturingPCU331315331315FREDindexmonthly
PPI: secondary smelting & alloying of aluminumPCU331314331314FREDindexmonthly
PPI: industrial electric powerWPU0543FREDindexmonthly
Global price of coal, AustraliaPCOALAUUSDMFREDUSD/tmonthly
Brent crudeDCOILBRENTEUFREDUSD/bbldaily
Henry Hub natural gasDHHNGSPFREDUSD/MMBtudaily
Show 5 more feeds
SeriesSource / idUnitFrequency
US 10Y TreasuryDGS10FRED%daily
COMEX aluminum futuresALI=FYahooUSD/tdaily
NIFTY Metal^CNXMETALYahooindexdaily
LME aluminium 3-monthLME:AHotherUSD/tdaily
US Midwest aluminium premiumCME:AUPotherUSD/lbdaily

Listed tickers (13)

Market context only: these prices tend to react first when a driver moves. Named for context; no affiliation.

Operators · 9

  • HINDALCO.NS Hindalco Industries (Novelis parent) NSE · IN
  • NATIONALUM.NS National Aluminium Co (NALCO) NSE · IN
  • VEDL.NS Vedanta (aluminium & alumina) NSE · IN
  • AA Alcoa NYSE · US
  • CENX Century Aluminum NASDAQ · US
  • NHY.OL Norsk Hydro Oslo Børs · EU
  • RIO Rio Tinto (Aluminium) NYSE · EU
  • 2600.HK Aluminum Corp of China (Chalco) HKEX · APAC
  • 1378.HK China Hongqiao HKEX · APAC

Consumers · 3

  • CSTM Constellium (rolling) NYSE · EU
  • BALL Ball Corp (can sheet consumer) NYSE · US
  • CCK Crown Holdings NYSE · US

Proxys · 1

  • GLEN.L Glencore (alumina/aluminium trading, Century stake) LSE · EU

KPIs, regions and who builds

KPIs the pack tracks

  • hot-metal cost (USD/t)
  • power consumption (kWh/kg Al, DC)
  • current efficiency (%)
  • alumina refinery cost (USD/t)
  • value-added product share (%)
  • EBITDA per tonne
  • tCO2e per t Al (Scope 1+2)
  • pot life (days)
  • capex per tpa
  • LTIFR

Regional notes

India#2 producer globally on captive coal power and Odisha bauxite; expansions by Vedanta, Hindalco and NALCO; carbon-intensity (~16+ tCO2/t, estimate) exposes exports to CBAM; India's CCTS sets intensity targets for aluminium.
United StatesFew operating smelters; 50% s232 tariff lifts the Midwest premium; new greenfield smelters (Century, EGA Oklahoma) contingent on 10-20 year power contracts and DOE support (estimate).
EuropeSmelter base shrank after the 2022 energy crisis; hydro-powered Nordic assets advantaged under CBAM; recycling growth.
Middle EastGCC ~9% of world primary output (estimate) on gas power; 2026 Iran war damaged Al Taweelah and disrupted Hormuz exports.
Asia-PacificChina capped near 45 Mtpa; capacity migrating to Indonesia (estimate).

Who builds and operates

Named for context; no affiliation. These are public market participants drawn from the research behind the pack. They are not Capibud clients or partners.

Operators · 12

  • Hindalco Industries Mumbai · INHirakud, Aditya, Mahan smelters with captive power; Novelis downstream; Embraer MoU on aerospace aluminium (Feb 2026).
  • Vedanta Aluminium (BALCO, Jharsuguda) New Delhi · INIndia's largest producer; Lanjigarh refinery expansion; exploring ~USD 5bn US investment (Mar 2026).
  • NALCO Bhubaneswar · INState-owned; 5th-stream refinery and smelter expansion (estimate).
  • Alcoa Pittsburgh · USIntegrated bauxite-alumina-aluminium; AUD 55m fine in 2026 for WA clearing.
  • Century Aluminum Chicago · USHawesville idled since 2022 on power costs; evaluating new US smelter (estimate).
  • Emirates Global Aluminium (EGA) Abu Dhabi · ME2.34 Mtpa; Al Taweelah damaged by Iranian strikes 28 Mar 2026; planned US smelter (Oklahoma) (estimate).
  • Ma'aden / Alba Riyadh / Bahrain · MEGulf smelters exposed to Hormuz disruption.
  • Rio Tinto Aluminium Montreal · USHydro-powered Quebec smelters; ELYSIS inert anode JV.
  • Norsk Hydro Oslo · EUHydro-powered smelters, recycling, extrusion.
  • Chalco / China Hongqiao Beijing / Shandong · APACChina capped at ~45 Mtpa capacity (estimate).
  • Novelis / Constellium Atlanta / Paris · USRolling; Bay Minette greenfield rolling mill (estimate).
  • Rusal Moscow · APACSanctions-affected flows (estimate).

Suppliers · 10

  • AP Technology (Rio Tinto) / EGA DX / GAMI / SAMI Licensor · EUReduction cell technology.
  • Fives / Outotec / Hencon OEM · EUPot-tending machines, anode handling, gas treatment.
  • ABB / Siemens / Hitachi Energy OEM · EURectiformers & substations — long-lead.
  • Bechtel / SNC-Lavalin (AtkinsRéalis) / Hatch EPC · USSmelter & refinery EPCM.
  • L&T / MECON / BHEL EPC · INIndian smelter/refinery and captive power EPC.
  • Rain Industries / Oxbow Materials · INCalcined petroleum coke & pitch.
  • Bauxite suppliers (CBG Guinea, Odisha Mining Corp) Materials · AFGuinea policy risk on bauxite exports.
  • Tata Power / NTPC / Coal India Materials · INPower and coal supply.
  • Wagstaff / Gautschi (casthouse) OEM · USDC casting equipment.
  • SMS group / Primetals (rolling mills) OEM · EUHot/cold rolling for FRP.

Customers · 6

  • Packaging (beverage cans) can sheetBall, Crown, Ardagh.
  • Automotive & EVs sheet, extrusions, castingsLightweighting; battery enclosures.
  • Building & construction extrusions, facadesWindows, cladding.
  • Power transmission & electrical wire rod, conductorsGrid expansion (India RDSS, US transmission).
  • Aerospace & defence plateHindalco-Embraer MoU 2026.
  • Consumer durables & solar frames extrusionsSolar module frames.

Project template

Work breakdown

Share of total duration per step; steps overlap where predecessors allow, as the bars show. O / ML / P are optimistic, most-likely and pessimistic multipliers on each step's duration; the hatched tail is the pessimistic case.

IDStep & timingShareO / ML / P
L100Power supply strategy & long-term PPA / captive plant decisionDevelop · factors: Power price, Grid queue15%0.9 / 1 / 1.8
L200Site, port access, environmental & emissions permitsDevelop · factors: Policy12%0.9 / 1 / 1.7
L300Reduction technology licence & basic engineeringEngineer · OEM · factors: Electrical equipment8%0.9 / 1 / 1.2
L400Detailed engineering (potrooms, carbon plant, casthouse)Engineer · EPC · factors: Labour12%0.9 / 1 / 1.3
L500Long-lead: rectiformers, substations, pot shells, PTMsProcure · OEM · factors: Electrical equipment, Steel, Copper22%0.9 / 1 / 1.6
L600Civil works: potrooms (~1 km), carbon plant, casthouse foundationsConstruct · EPC · factors: Construction materials, Steel, Labour22%0.9 / 1 / 1.4
L700Potline erection & busbar installationConstruct · EPC · factors: Aluminium, Steel, Labour20%0.9 / 1 / 1.4
L800Carbon plant (green anode, bake furnace) & roddingConstruct · EPC · factors: Steel, Labour15%0.9 / 1 / 1.4
L900Casthouse & alumina/materials handling, port unloadersConstruct · EPC · factors: Steel, Electrical equipment14%0.9 / 1 / 1.4
L1000HV interconnection / captive power plantConstruct · EPC · factors: Electrical equipment, Grid queue20%0.9 / 1 / 1.6
L1100Energisation & sequential pot start-upCommission · OEM · factors: Power price, Labour10%0.9 / 1 / 1.5
L1200Ramp-up, current creep & performance testsCommission · factors: Labour8%0.8 / 1 / 1.6

Cost breakdown

Share of capex by line, with the commodity exposure of each line (the share of that line that moves with the commodity).

  • Potlines & reduction technology (cells, busbars, PTMs)30%
    Equipment
    • Steel 30%
    • Aluminium 20%
    • Copper 10%
  • Civil works & buildings15%
    Construction
    • Construction materials 50%
    • Steel 40%
  • Rectifiers, substations & electrical12%
    Equipment
    • Electrical equipment 70%
    • Copper 20%
  • Carbon plant (anode production & baking)12%
    Equipment
    • Steel 30%
    • Construction materials 20%
  • Casthouse8%
    Equipment
    • Steel 30%
    • Electrical equipment 20%
  • Materials handling, alumina storage & port6%
    Construction
    • Steel 40%
  • Erection labour6%
    Labour
    • Labour 100%
  • Engineering & technology licence5%
    Engineering
    • Labour 50%
  • Owner's costs, land & IDC4%
    Indirects
    • Interest rates 70%
  • Pot start-up, first fill & metal inventory2%
    Commissioning
    • Power price 40%
    • Aluminium 30%

Financial template

Revenue model

Primary metal sold at LME + regional premium (+ value-added product premium); integrated players capture alumina and power margins; cost = alumina, power, carbon, fluoride and conversion.

Margin driver

Smelter margin (price + premium − power − alumina − carbon)

Ramp-up

1 year to steady state

How Capibud uses this pack

A pack is a starting position, not a forecast. When a aluminium decision opens in Capibud, pack v1.0.0 is copied in and pinned to that decision. The 14 parameters, 10 swing factors and templates the committee saw stay attached to the decision record, even after the pack is next refreshed.

Parameter ranges and WBS durations seed the P50, P80 and P90 for capex, schedule and value. Your own estimates, vendor quotes and actuals replace pack defaults line by line, and the record shows which numbers are still defaults.

Each swing factor is wired to shared factors; here the heaviest are policy, power price, electrical equipment and grid queue. A move in one factor hits every exposed project in the same scenario, which is how the capital committee sees concentration across a book rather than project by project.

The 13 price feeds and 13 listed tickers feed the brain, which watches for drivers moving outside their pack range and drafts the change for a person to review.

Shared factors behind this pack's swing factors

  • Policy
  • Power price
  • Electrical equipment
  • Grid queue
  • Labour
  • Interest rates
  • Steel
Relative weight: probability × impact × driver weight, summed over swing factors.

Capex tied to a shared factor

  • Steel23.4%
  • Electrical equipment10%
  • Construction materials9.9%
  • Labour8.5%
  • Aluminium6.6%
  • Copper5.4%
  • Interest rates2.8%
Share of total capex, from the cost breakdown and its commodity exposures.

Sources

Every link opens the original source in a new tab. Values marked as estimates are informed estimates by the Capibud research team.

  1. fred.stlouisfed.orghttps://fred.stlouisfed.org/series/PALUMUSDM
  2. fred.stlouisfed.orghttps://fred.stlouisfed.org/series/WPU102501
  3. fred.stlouisfed.orghttps://fred.stlouisfed.org/series/WPU0543
  4. arxiv.orghttps://arxiv.org/abs/2606.15757
  5. paimana-proj.mospi.gov.inhttps://paimana-proj.mospi.gov.in/Content/ArchiveReport/flash/2025-26/FlashReport_March_2026.pdf
  6. en.wikipedia.orghttps://en.wikipedia.org/wiki/Tariffs_in_the_second_Trump_administration
  7. taxation-customs.ec.europa.euhttps://taxation-customs.ec.europa.eu/carbon-border-adjustment-mechanism_en
  8. en.wikipedia.orghttps://en.wikipedia.org/wiki/2026_Strait_of_Hormuz_crisis
  9. en.wikipedia.orghttps://en.wikipedia.org/wiki/Emirates_Global_Aluminium
  10. en.wikipedia.orghttps://en.wikipedia.org/wiki/Aluminium_smelting
  11. en.wikipedia.orghttps://en.wikipedia.org/wiki/Century_Aluminum
  12. en.wikipedia.orghttps://en.wikipedia.org/wiki/Alcoa
  13. en.wikipedia.orghttps://en.wikipedia.org/wiki/Hindalco_Industries
  14. en.wikipedia.orghttps://en.wikipedia.org/wiki/Vedanta_Limited
  15. en.wikipedia.orghttps://en.wikipedia.org/wiki/National_Aluminium_Company

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