In April, the White House released a policy explanation document, announcing a new tariff policy for key industrial sectors. This policy will expand the scope of tariffs based on "Section 232" from primary products such as steel, aluminum, and copper to derivative products, and a new hierarchical tax rate system has been established. This move, under the pretext of "preventing avoidance" and "national security," aims to build a more stringent protection network by changing the tax base and setting exemption thresholds, in order to drive industrial chain restructuring with refined tariffs.
Core policy changes
The substantial effect of "openly lowering and secretly raising"
The most notable feature of this tariff adjustment is the introduction of a new tax rate system based on metal content, which has completely changed the tax base for tariffs. According to the announcement by the White House of the United States, the policy has established a progressive tax rate system with five brackets: 0%, 10%, 15%, 25%, and 50%. For primary products that are fully or almost fully made of steel, aluminum, or copper, such as steel coils, aluminum sheets, beams, pipes, etc., the 50% high tariff is maintained, but the tax base is changed from the previous "metal content value" to the "full customs value of imported goods". For derived products with a metal content of more than 15%, the nominal tax rate is reduced from 50% to 25%, however, the tax base is also expanded to the full value of the goods. Products with a metal content of 15% or less are completely exempted and are no longer subject to the Section 232 tariff. In addition, the policy has set preferential tax rates for specific targets: products manufactured overseas using steel, aluminum, or copper that are completely refined or cast in the United States are subject to a lower 10% tariff; and some metal-intensive industrial equipment and power grid equipment can enjoy a transitional tax rate of 15% before December 31, 2027.
This combination of "lower tax rates and wider tax base" has produced a substantive effect of "apparent reduction and hidden increase". Some analyses point out that for derivative products with an aluminum content of more than 15%, although the tax rate has been reduced to 25%, the actual tax burden may not decrease due to the expansion of the tax base from "metal content" to "total value of the product". Especially for those finished products where the proportion of metal value to the total value of the product is less than 50%, the tariff burden borne by enterprises will significantly increase. The industry's view also believes that the policy seems to reduce the tax rate, but in actual operation, it may actually increase the cost of enterprises, because the basis of taxation has expanded from "metal content" to "total value of the product". For example, a imported gas stove or washing machine, its steel content may only account for a part of the cost, but now it needs to pay taxes at 25% of the total value of the machine, which undoubtedly greatly increases the import threshold. This design precisely targets the previous loopholes in the tariff system - that is, importers avoid high tariffs by simply processing primary metals into parts or semi-finished products and then exporting them to the United States. This policy, by taxing the full value, makes it difficult for any finished product containing a certain proportion of the "critical metals" defined by the United States to escape, achieving an expansion of the protection range from "point" to "face".
Its strategic intention is in the name of national security
Carry out the reconstruction of the industrial chain
The Trump administration's recent policy adjustment still legally relies on Section 232 of the Trade Expansion Act of 1962, extending and strengthening its trade - protection measures under the pretext of "national security." The White House made it clear in its announcement that the relevant imported goods "threaten the national security and industrial base of the United States." However, beneath the cloak of "national security," its core strategic intention clearly points to two inter - related goals: preventing tariff - avoidance to protect the domestic primary - metal industry, and guiding key links of the industrial chain back through differentiated tax rates.
First, the policy directly responds to the implementation dilemma of the old system. Before, only 50% of tariffs were levied on the metal content part of products, which not only required complex manual calculations but also provided room for enterprises to evade tariffs by understating the import value or metal content. The unified taxation based on the full value of goods greatly simplified customs enforcement, compressed the space for enterprises' compliance operations, and made the protection effect more rigid.
Second, the differentiated tax rate design reflects a refined industrial policy mindset. The 15% lower transitional tax rate for specific industrial equipment such as power grid equipment until 2027 is clearly aimed at serving the goal of "accelerating the large-scale industrial infrastructure construction that is currently underway across the United States." Some analyses point out that this reflects the urgent reality demand in the United States for updating or building new power infrastructure in the context of rapid development of artificial intelligence. In other words, the policy not only protects the upstream raw material industry but also reduces the cost of downstream key infrastructure construction related to energy transition and technological competitiveness.
More profoundly, the 10% preferential tax - rate clause (for products fully manufactured overseas with metal of US origin) has strong industrial - chain - guiding characteristics. It is not a simple tariff reduction, but an incentive signal encouraging global manufacturers to give priority to purchasing US - produced metal raw materials in their supply chains. This aims to consolidate the United States' position as the global center for the supply of metal raw materials and deeply bind the downstream processing and manufacturing links to US resource output. At the same time, the special treatment for the UK (with a commodity tax rate of 25% and derivatives at 15%) highlights the United States' courtship and differential treatment of core allies in building a "friend - shoring" supply - chain system. This series of measures is in line with the strategy of building a new diplomatic layout around key minerals under the "US First" agenda of the Trump administration. Its ultimate goal is to systematically reshape the layout and flow of the global metal industry chain through the economic lever of tariffs, enhancing the United States' control over the entire industry chain.
This move will impact the global mining landscape
Profound impact and chain reaction
The United States, as one of the world's largest economies, a significant shift in its metal trade policies is bound to trigger a series of chain reactions in the global mining market, with far-reaching and complex impacts.
In the short term, the policy has exacerbated market volatility and supply chain concerns. As the policy was about to take effect, there was already a rush to hoard goods in the market. Some analyses point out that although raw copper itself is exempted, the new tariffs on semi-finished products and derivatives of metals such as copper could lead to a rush to hoard in the US market, exacerbating global supply shortages. This kind of behavior based on expectations disrupts the normal flow of trade. For export enterprises, especially those that manufacture metal derivatives for export to the United States, the policy brings direct cost shocks and compliance challenges. Enterprises must immediately reassess product classification, accurately calculate metal content, and calculate changes in tax burden. Those who produce metal-containing products with an added value of 15% to 50% may face the risk of a significantly compressed profit margin or even loss of the US market. This will force global manufacturers to re-plan their supply chains and production layouts, considering the transfer of final assembly to the United States or finding alternative raw material supply sources and export markets.
In the medium and long term, this policy will accelerate the multi-polarization and regionalization of the global mining trade pattern. The US attempt to establish a closed loop of metal industries that are relatively self-sufficient or prioritize trade with allies through high tariff barriers will inevitably prompt other metal-producing and consuming countries to seek new trading partners and cooperation agreements.
In addition, the impact of the above policies on different metal varieties varies. For copper, its impact is particularly subtle. On the one hand, the global copper market itself is facing a structural shortage. In the first quarter of this year, the China Copper Raw Material Joint Negotiation Group decided not to set the second quarter guide price due to the deep discount of the spot premium, and domestic smelters plan to reduce production by more than 10%, which highlights the tight supply of copper mines. The US tariff on copper derivatives may further distort trade flows and push up regional spreads in the short term. On the other hand, since the US has limited domestic copper mine capacity, it is not realistic to completely isolate imports. This policy mostly increases the complexity and cost of global copper trade. For aluminum and steel, the US has relatively more domestic capacity, and protectionist policies may have a more obvious support effect on its domestic industries, but it will also push up the input costs of the US manufacturing industry.
Eventually, the tariff escalation, which started on the premise of “national security,” will be tested in a complex game of multiple objectives, including economic growth, inflationary pressures, alliance relationships, and the efficiency of global resource allocation. It marks a new phase in global metal trade, with more complex rules, higher barriers, and a stronger geopolitical color. All market participants must adapt to this new normal of “security generalization” competition.
Overall, the new US tariff policy is essentially an upgrade of trade protectionism, with the core content of extending protection to the entire industrial chain through "base expansion and progressive collection". It masquerades as national security, but in reality, it aims to protect domestic industries and guide supply chains back. This move may increase the cost of US manufacturing, promote the restructuring of the global metal trade pattern towards regionalization and multipolarization, and the global mining competition will enter a new period with higher barriers and greater geopolitical considerations.
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