The global aluminum market is fragmenting into three distinct regional pricing regimes — the United States, Europe, and the rest of world — each with its own premium structure, trade barriers, and supply dynamics. The catalyst is the Trump administration's escalation of Section 232 tariffs on aluminum to 50% of full customs value, effective April 6, 2026. (FACT: GHY Trade Compliance, May 7, 2026; White House Proclamation, April 2, 2026) The result: a record Midwest premium of $1,942/t that is reshaping global trade flows and creating unprecedented cost disparities between regions. (FACT: World Scorecard via Reuters, April 24, 2026)
US: The tariff fortress
The April 2026 proclamation strengthened Section 232 tariffs in two critical ways. First, the rate doubled from 25% to 50% for articles made entirely or almost entirely of aluminum. Second, the tariff now applies to the full customs value of the imported product, not just the metal content. (FACT: GHY Trade Compliance, May 7, 2026; American Recycler, April 24, 2026) This change closed a loophole where importers had been declaring low metal content values to reduce duty exposure. A steel coil or aluminum sheet now pays 50% of its full invoice value at the border.
The Midwest premium — the surcharge US buyers pay on top of the LME price for physical delivery into the US Midwest — has surged to a record $1,942/t. (FACT: World Scorecard, April 24, 2026; National Interest, May 8, 2026) To put this in perspective: a US buyer importing aluminum at LME cash of $3,670/t faces an effective delivered cost of approximately $5,612/t after adding the Midwest premium and tariffs. That is roughly 53% more than the LME price alone. Packaging, automotive, and construction sectors are being squeezed hardest, though domestic producers have reported windfall profits. (FACT: National Interest, May 8, 2026; CNBC, May 18, 2026)
The tariff wall has created an unusual dynamic: US primary aluminum production is running near capacity, but domestic supply meets only about 40% of US demand. The remaining 60% must be imported, and every import faces the 50% tariff. Century Aluminum's CEO Jesse Gary described the environment as a "healthy go-forward environment" for US producers — a characterization that US buyers would dispute. (FACT: Ticker Report, May 10, 2026) Secondary aluminum producers are benefiting as scrap spreads widen relative to primary, making secondary alloys increasingly attractive substitutes.
Canada: The diverted supplier
Canada is the largest foreign supplier of primary aluminum to the US — but the 50% tariff has made that trade uneconomical for many volumes. Canadian producers, led by Rio Tinto's Alma and Bécancour smelters, have aggressively diverted shipments to Europe, where the EU's duty-free quota system (under the EU-Canada Comprehensive Economic and Trade Agreement, CETA) provides a more welcoming destination. (FACT: National Interest, May 8, 2026)
This diversion has created a peculiar arbitrage: Canadian aluminum that would have entered the US paying 50% duty instead enters Europe duty-free under CETA. European buyers, already dealing with the loss of Mozal and constrained Gulf supply, are absorbing Canadian volumes — but not without adding to their own cost base through the EU's Carbon Border Adjustment Mechanism (CBAM). (FACT: ODI, May 13, 2026)
Europe: CBAM adds complexity
The EU's Carbon Border Adjustment Mechanism, in its transitional phase through 2026, adds a new cost layer for non-European suppliers. CBAM requires importers to purchase carbon certificates corresponding to the carbon price that would have been paid had the goods been produced under EU carbon pricing rules. For aluminum — a highly emissions-intensive commodity — CBAM compliance adds an estimated $50-80/t to the cost of imported metal from non-carbon-priced jurisdictions. (FACT: ODI, May 13, 2026; European Commission CBAM Regulation)
The CBAM cost is not uniform. Aluminum produced using hydroelectricity — such as Icelandic, Canadian hydro-powered, or Norwegian metal — has a low embedded carbon footprint and therefore faces minimal CBAM charges. Aluminum produced using coal-fired power — typical of Chinese, Indian, and some Gulf smelters — faces the highest CBAM costs. This creates a carbon-driven pricing hierarchy within Europe: low-carbon metal commands a premium, while high-carbon metal is penalized at the border.
The Mozal closure illustrates the intersection of these dynamics. ODI analysts noted that Mozal's output — powered by hydroelectricity — could theoretically have remained competitive under CBAM, but the underlying energy tariff dispute made the question academic. (FACT: ODI, May 13, 2026) For European buyers, CBAM is not just a compliance cost — it is reshaping the competitive landscape in favor of low-carbon producers in Iceland, Norway, and Canada, while penalizing supply from China, India, and the Gulf.
The number that matters for your business: The cost disparity between regions is now extreme. A US buyer paying $5,612/t effective delivered cost (LME + Midwest premium + tariff) and a European buyer paying approximately $3,970/t (LME + duty-paid premium + CBAM) face a gap of $1,642/t. For a buyer sourcing 20,000 tonnes annually, that regional cost gap represents $32.8 million in extra costs if located in the US versus Europe — a difference large enough to drive relocation decisions in energy-intensive manufacturing.
Action: US buyers: (1) Maximize secondary aluminum usage where specifications allow — the scrap-to-primary spread has widened to over $400/t, making A380 and 6061 secondary alloys significantly cheaper than P1020 primary; (2) Evaluate tolling arrangements with domestic producers to avoid tariff exposure on imported metal; (3) Consider Canadian metal under a potential USMCA renegotiation — any tariff relief in the mid-2026 review would reopen the most cost-effective supply route.
European buyers: (1) Prioritize low-carbon suppliers from Iceland, Norway, and Canada — CBAM costs will increase as the mechanism moves from transitional to full implementation in 2027; (2) Lock in CETA-origin Canadian volumes now — competition for duty-free Canadian metal is intensifying as US buyers seek alternatives; (3) Model CBAM costs into all new supply contracts — the carbon certificate price is expected to rise as the EU tightens its ETS cap.
Horizon: US: Act within 30 days before the USMCA review results in tariff changes that could shift premium dynamics. Europe: CBAM costs will increase in the January 2027 full-implementation phase — lock in 2027 supply terms for low-carbon metal by Q3 2026.
Trigger: Watch (1) USMCA review outcome in mid-2026 — any Canadian aluminum tariff relief immediately compresses the Midwest premium; (2) EU ETS carbon price trajectory — currently ~$70/t; a move above $100/t significantly increases the CBAM cost advantage of low-carbon suppliers; (3) Midwest premium (P1020 AUP) weekly data — a premium above $2,000/t forces broad demand destruction in US manufacturing.