I. Overview of Core Impacts
The escalation of the US-Iran conflict has triggered severe turmoil in the geopolitical situation in the Middle East, and its impact has quickly spread from the energy market to the global aluminum industry chain, forming a dual shock of "supply-side disruption + soaring logistics costs". Among them, Iran's 800,000 tons of installed electrolytic aluminum capacity (with an annual actual output of about 630,000 tons) is trapped in a dilemma of "unable to import raw materials and export finished products". Meanwhile, the security risks in the two key shipping lanes of the Red Sea and the Strait of Hormuz have directly pushed up the global shipping costs of alumina and aluminum ingots, further exacerbating the supply-demand tension and price fluctuations in the global aluminum market. The short-term impact is significant, and the long-term may reshape the industrial chain layout.
II. Iran's Electrolytic Aluminum Capacity: Trapped in the Dilemma of Two-Way Blockage in Import and Export
(I) Basic Overview of Iran's Electrolytic Aluminum Industry
Iran is an important electrolytic aluminum producer in the Middle East, with 4 core production enterprises, among which Southern Aluminum Company (SALCO) is the industry leader, accounting for more than 40% of the output. Its total installed electrolytic aluminum capacity is about 800,000 tons per year, but due to factors such as unstable power supply and long-term sanctions, the capacity utilization rate is relatively low. The normal annual output in 2025 is about 630,000 tons, accounting for about 0.7%-0.8% of the global total electrolytic aluminum output. The annual export volume of aluminum ingots reaches 200,000-250,000 tons, with more than one-third of the output used for export earnings. The core export destinations are countries in the Middle East, Southeast Asia and South Asia. It is worth noting that although Iran's electrolytic aluminum industry has a cost advantage relying on local cheap natural gas and electricity, it has significant shortcomings in the industrial chain, making it the most vulnerable link in the conflict.
(II) Blocked Raw Material Imports: 80% Dependence on Alumina Imports, Supply Chain on the Verge of Breakdown
The core raw material for electrolytic aluminum production is alumina. However, Iran has limited bauxite reserves and severely insufficient alumina production capacity, with only 1 alumina production enterprise with an annual capacity of about 280,000 tons. The self-sufficiency rate of alumina is only about 20%, and 80% of the raw material demand needs to be met through imports. The core import sources are India, China and Australia.
After the escalation of the US-Iran conflict, the risk of blocked raw material imports has fully erupted: on the one hand, Western sanctions against Iran have been further intensified, restricting Iran's foreign exchange settlement capacity, making it difficult to pay import fees normally and significantly extending the raw material procurement cycle; on the other hand, as the only maritime channel for Iran's raw material imports, the Strait of Hormuz is currently facing restricted navigation, ship suspension or diversion due to the conflict, and global shipping companies have suspended routes in this area one after another, resulting in the failure of imported alumina to arrive in Iran in a timely manner.
It is estimated that Iran's electrolytic aluminum industry needs to import about 1.24 million tons of alumina every year. If shipping is continuously blocked and raw materials cannot enter the country, the local alumina capacity can only support the production of about 125,000 tons of electrolytic aluminum, which means that about 80% of its 800,000 tons of electrolytic aluminum capacity will be shut down due to raw material shortage, directly reducing global electrolytic aluminum supply by nearly 600,000 tons per year. Coupled with the damage to power facilities caused by the conflict, Iran's relevant capacity has basically stopped production, and the difficulty of resumption is extremely high.
(III) Blocked Finished Product Exports: Interrupted Trade Channels, Dilemma in Capacity Absorption
The export of Iran's electrolytic aluminum finished products (mainly aluminum ingots) is completely dependent on maritime transportation, and 100% of them need to be transported through the Strait of Hormuz. The navigation safety of this strait directly determines the normal operation of its export trade. After the escalation of the US-Iran conflict, the shipping risk in the Strait of Hormuz has surged, the safety of ship navigation cannot be guaranteed, and insurance premiums have soared sharply. Major global shipping companies have avoided this route one after another, resulting in the failure of Iranian aluminum ingots to be loaded and exported normally.
The blocked exports have directly brought two major problems: first, the inventory of Iranian aluminum ingots has accumulated rapidly, and enterprises have difficulty in capital recovery, which cannot maintain normal production and operation, further exacerbating the pressure of production reduction or even suspension; second, there has been a local gap in the global spot supply of aluminum ingots, especially in regions such as the Middle East and Southeast Asia that rely on Iranian aluminum ingot imports, and the expectation of supply tension has risen, indirectly pushing up global aluminum prices. In addition, the export of Iranian aluminum products is also affected by Western sanctions, and some countries have suspended aluminum trade cooperation with Iran, further compressing its export space.
III. Fermenting Shipping Risks: Pushing Up Global Shipping Costs of Alumina and Aluminum Ingots
(I) Two Key Straits: The "Throat" of Global Aluminum Industry Chain Logistics
The Red Sea and the Strait of Hormuz are the core channels for global maritime trade of alumina and aluminum ingots, undertaking most of the transportation tasks of global aluminum-related products: as the only maritime channel from the Persian Gulf to the Indian Ocean, the Strait of Hormuz is not only the only way for Iran's raw material imports and finished product exports, but also the core hub for raw material imports and finished product exports of the Middle East's electrolytic aluminum industry (with a total capacity accounting for 9% of the world), undertaking more than 90% of the maritime trade of aluminum products and alumina in the Middle East; the Red Sea channel connects the Indian Ocean and the Mediterranean Sea, and is an important shortcut for aluminum trade between Europe, Africa and Asia, with about 25% of global aluminum and related raw material trade passing through this channel.
The navigation stability of the two straits directly determines the efficiency and cost of global aluminum industry chain logistics. Once there is a shipping risk, it will be quickly transmitted to the global aluminum market.
(II) Specific Impacts of Shipping Risks: Soaring Freight + Transportation Delay
After the escalation of the US-Iran conflict, the shipping risks in the Red Sea and the Strait of Hormuz have continued to ferment, exerting a dual impact on the global maritime transportation of alumina and aluminum ingots and directly pushing up logistics costs:
1. Sharp Surge in Freight Costs: Due to shipping companies' concerns about navigation safety, they either suspend relevant routes or choose to detour (such as detouring the Cape of Good Hope), resulting in a significant increase in transportation mileage (the voyage detouring the Cape of Good Hope can be extended by 10-20 days) and a sharp rise in transportation costs. According to market estimates, the freight rates of routes in the Red Sea and the Strait of Hormuz have soared by 300%-400%, and the war insurance rates for some routes have also soared simultaneously, further increasing the pressure of logistics costs. Among them, the maritime transportation costs of bulk goods such as alumina and aluminum ingots have increased particularly significantly, directly increasing the logistics cost burden of the global aluminum industry chain.
2. Extended Transportation Cycle and Delivery Delay: Restricted routes and difficult ship scheduling have led to a significant extension of the transportation cycle of alumina and aluminum ingots, and the delivery delay of some goods can reach 1-2 weeks or even longer. For electrolytic aluminum production enterprises, the delay in the delivery of raw materials (alumina) may lead to production interruption; for downstream demand enterprises, the delay in the delivery of aluminum ingots may affect production plans, further exacerbating the supply-demand mismatch in the global aluminum market and amplifying market fluctuations.
3. Shipping Uncertainty Aggravates Market Panic: At present, the situation of the US-Iran conflict is still in the stage of escalation, and there is a high degree of uncertainty about the navigation risks of the two straits. Shipping companies and traders have adopted a wait-and-see attitude one after another, reducing the capacity investment in relevant routes, leading to tight global maritime transportation capacity of alumina and aluminum ingots, further pushing up freight rates, and at the same time exacerbating the market's concerns about the stability of the global aluminum supply chain, driving a phased rise in aluminum prices.
IV. Extended Impacts and Future Outlook
(I) Short-Term Impact on the Global Aluminum Market
In the short term, the impact of the US-Iran conflict is mainly concentrated on "supply contraction + cost increase": Iran's electrolytic aluminum capacity is facing production suspension or significant production reduction due to raw material shortage and blocked exports, directly reducing global electrolytic aluminum supply; at the same time, the soaring shipping costs have pushed up the global logistics costs of alumina and aluminum ingots. Coupled with the global electrolytic aluminum inventory being at a five-year low (only 1.62 million tons), the ability to resist supply shocks is weak, further supporting the upward trend of aluminum prices. In the short term, aluminum prices are prone to rise and difficult to fall, and volatility is significantly amplified.
(II) Long-Term Impact on the Global Aluminum Industry Chain
In the long term, if the US-Iran conflict continues to escalate and the navigation of the two straits is restricted for a long time, it will have a structural impact on the global aluminum industry chain: first, the fragility of the supply chain of the Middle East's electrolytic aluminum capacity is completely exposed, and global downstream enterprises will accelerate the diversification of the supply chain, reduce import dependence on Middle East aluminum ingots, and transfer orders to regions with more stable supply chains such as China and Russia; second, energy security and supply chain stability will become the core considerations for the layout of electrolytic aluminum capacity, and the capacity relying on stable energy supply will obtain a valuation premium; third, the global aluminum industry chain will accelerate restructuring, and the logistics layout will develop in a diversified direction to avoid the risks of a single shipping channel.
(III) Key Focus Points
In the future, we need to focus on three core variables to judge the duration of the impact: first, the navigation situation of the Strait of Hormuz and the Red Sea, which is the core factor determining the logistics and supply of the aluminum industry chain; second, the resumption progress of Iran's electrolytic aluminum capacity, as well as the recovery of raw material imports and finished product exports; third, the evolution of the US-Iran conflict situation. If the conflict eases and shipping risks subside, the geopolitical premium of aluminum prices will gradually fade and return to the basic supply and demand fundamentals of the market; if the conflict continues to spread, it may trigger a global aluminum supply crisis and push aluminum prices to rise further sharply.
