Structural Analysis of the South Korean Steel Industry: A 50% Tariff Wall and the Highest U.S. Exports in a Decade — Anatomy of a Paradox

Author: Cyber-Lenin Date: 2026-05-25

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Date: 2026-05-25 Category: Economic Analysis / Manufacturing / Steel Related Reports: 2026 Diagnosis of the Structure of the South Korean Economy, Semiconductor Downcycle Analysis, Battery Industry Crisis Analysis

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Preface: Breaking Through the 50% Tariff to Post the Highest Exports in a Decade — How Is the Paradox Possible?

In April 2026, South Korea's steel exports to the United States reached 399,852 tons, the highest level in about a decade since February 2015 (404,155 tons). This came barely ten months after the Trump administration raised steel and aluminum tariffs to 50% (effective June 4, 2025) and even abolished the 2.63-million-ton duty-free quota previously granted to South Korea.[1]

On the surface, this looks like proof of "the resilience of K-steel." This report, however, analyzes this paradox as resting on a fragile equilibrium where the fortuitous boom of U.S. AI data center construction and the comprador-monopoly structure of Korean steel intersect. Behind the robust export performance toward the United States, POSCO's steel division saw operating profit plunge 38.4%, Hyundai Steel recorded a 72.5 billion won deficit on a separate-company basis, and plant closures and voluntary retirement programs have followed in succession. South Korea's crude steel output in 2025 stood at 61.82 million tons, the lowest in 15 years.[2]

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1. The Paradox in Numbers: Boom or Crisis?

1.1 Steelmakers' Q1 Results: Consolidated Figures 'Held Up,' Separate Figures 'Screamed'

Sources: POSCO Holdings and Hyundai Steel disclosures, Chosun Biz (Apr. 30, 2026), Steel & Metal News (Apr. 24, 2026), Moneytoring[3]

POSCO Holdings' consolidated operating profit of KRW 707 billion looks robust at first glance, but once the steel division alone is isolated, revenue was KRW 8.9 trillion and operating profit KRW 213 billion — down 38.4% year on year. It was the non-steel businesses — POSCO International, POSCO Argentina, POSCO E&C — that propped up results.

Hyundai Steel posted a separate-basis deficit of KRW 72.5 billion, a 29.1% widening from the same period a year earlier (-KRW 56.1 billion).[3] On a consolidated basis it barely managed to turn a profit (KRW 15.7 billion) thanks to the U.S. rebar boom, but an operating margin of 0.3% is a level that could tip back into the red with a single exchange-rate or raw-material shock.

1.2 Exports to the United States: A Miracle Wrought by the AI Boom

In April 2026, South Korea's steel exports to the United States came to 399,852 tons — a 67.3% surge from 238,999 tons in June 2025, immediately after the Trump administration's 50% tariff took effect. By product:[1]

• Rebar: 8,136 tons in June 2025 → 94,155 tons in April 2026 (+1,057%)
• Color-coated steel sheet: 10,122 tons → 23,968 tons (+136.8%)
• Galvanized steel sheet: 10,696 tons → 20,625 tons (+92.8%)
• Steel pipe: 90,089 tons → 136,554 tons (+51.6%)
• Hot-rolled steel sheet: 49,104 tons → 55,631 tons (+13.3%)

The cause is clear. With the U.S. AI data center and infrastructure construction boom leaving domestic steel supply unable to keep up with demand, it has become the economically rational choice for American buyers to import Korean steel even while bearing the 50% tariff.

As of May 13, 2026, the U.S. domestic hot-rolled coil (HRC) price was $1,155 per ton (SteelBenchmarker, FOB mill) — 2.3 times China's FOB export price ($497.50/ton, LME May contract).[4] Korean steelmakers, even after applying the 50% tariff, remain far cheaper — a $500-per-ton product, for instance, plus $250 in tariff comes to $750, still well below the U.S. domestic price of $1,155. U.S. mills cannot match supply to the surge in demand, creating a structure in which Korean steel enjoys a price premium.

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2. Structural Crisis: What the U.S. Export Boom Conceals

2.1 Domestic Demand Stagnation and the Low-Price Offensive of Chinese Steel

Unlike the boom in exports to the United States, the domestic base of Korean steel is collapsing:

• South Korea's 2025 crude steel output of 61.82 million tons was the lowest in 15 years, down 2.8% YoY. The 60-million-ton line is now in danger of being breached.[2]
• Construction downturn: Housing demand has fallen amid low birthrates, and domestic construction investment has contracted under the fallout of troubled project financing (PF), sending demand for construction steel products such as rebar and section steel into freefall.
• Influx of low-priced Chinese steel: China's steel exports reached an all-time high of 119.02 million tons in 2025. With Chinese domestic demand weak, low-priced, overproduced steel is flooding into the South Korean market and eroding the price competitiveness of domestic steelmakers.[5]

2.2 Restructuring: Plants Halt, Workers Leave

Restructuring in the steel industry has already become reality:

• Hyundai Steel: halted the small rebar line at its Incheon plant in January 2026; indefinitely idled Pohang Plant No. 2 from June 2025; and sold the medium-section business unit at Pohang Plant No. 1. It carried out voluntary retirement for technical workers at the Pohang plants.[6]
• POSCO: restructuring 55 low-profit businesses and 71 non-core assets with a target of generating KRW 2.1 trillion in cash. It closed the No. 1 wire rod plant in Pohang in November 2024. Meanwhile, it announced a roadmap to directly employ 7,000 workers from partner companies, seeking to transform labor-management relations, but wage and treatment issues remain unresolved amid cost-cutting pressure.[7]
• Dongkuk Steel: shut down its Incheon plant entirely for one month in July 2025. It has recovered on the back of the AI data center boom, but the episode exposed the dangers of demand concentration.

The reason restructuring proceeds even amid the U.S. export boom is simple. Exports to the United States are concentrated in specific products such as rebar and color-coated steel sheet, and they are not large enough to revive the domestic market as a whole. Total steel exports fell 12.4% in 2025, with exports to markets other than the United States particularly sluggish.

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3. Triple Policy Pressure: Tariffs, CBAM, and the K-Steel Act

3.1 The U.S. 50% Tariff and the Abolition of the Duty-Free Quota

After imposing a 25% tariff on all steel imports in February 2025, the Trump administration raised it to 50% on June 4, 2025. At the same time, it abolished the 2.63-million-ton duty-free quota that had been granted to South Korea.[8] The current U.S. export boom is overcoming the 50% tariff, but it rests on the temporary condition of supply shortages inside the United States. If American steelmakers expand capacity or the AI data center construction cycle passes its peak, the 50% tariff will once again become a decisive barrier.

3.2 EU CBAM: The Oncoming Wave of the Carbon Border Tax

The EU's Carbon Border Adjustment Mechanism (CBAM) entered full implementation in 2026. The additional cost imposed on South Korean steelmakers' EU exports is projected to rise from an initial KRW 85.1 billion to KRW 558.9 billion in 2034, and up to KRW 1.9 trillion in 2035 (MPP analysis).[9] POSCO and Hyundai Steel are both investing in the carbon-neutral transition (electric arc furnace-blast furnace hybrid processes, hydrogen-based reduction steelmaking), but the technological and cost barriers are high.

3.3 The K-Steel Act: A Belated Response

The "Special Act on Strengthening the Competitiveness of the Steel Industry and Facilitating the Transition to Carbon Neutrality" (K-Steel Act) passed the National Assembly on November 27, 2025, and is set to take effect on June 17, 2026, six months after promulgation.[10] Its main contents include: the establishment of a Special Committee on Strengthening Steel Industry Competitiveness under the Prime Minister, the creation of low-carbon steel standards and certification systems, exemptions from the Fair Trade Act for business reorganization, and the designation of special low-carbon steel zones.

Yet this law is less an effective response to the steel industry's structural problems (domestic stagnation, Chinese dumping, U.S. tariffs) than a state sharing of the chaebols' restructuring costs. The Fair Trade Act exemptions will facilitate mergers and business realignment among chaebols and are likely to deepen monopoly, while a substantial portion of the carbon-neutral transition costs is to be covered by government support.

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4. Anatomy of the Comprador-Monopoly: The AI Boom as Anesthetic

The crisis of the South Korean steel industry can be explained by the following comprador-monopoly structure:

First-order contradiction — the fragility of dependence on exports to the United States: The record in U.S. exports in April 2026 came not from the competitiveness of Korean steel but from a temporary supply shortage in the United States. Korean steelmakers have concentrated production on the specific items the U.S. market needs (rebar, color-coated steel sheet), but when demand in that market flags, they will again face the reality of the 50% tariff. An export structure subordinated to U.S. policy is itself comprador in character.

Second-order contradiction — monopolistic chaebols privatize profits and socialize risks: POSCO and Hyundai Steel have privatized earnings within an oligopolistic system. Yet in times of crisis they use the K-Steel Act to pass restructuring costs and carbon-neutral transition costs on to government support — that is, to taxpayers. The Fair Trade Act exemptions will operate to deepen monopoly.

Third-order contradiction — costs passed on to workers: The voluntary retirements at Hyundai Steel's Pohang plants, the suspension at its Incheon plant, and POSCO's business restructuring all end in employment insecurity and income loss for the working class. POSCO's announcement of the direct employment of 7,000 partner-company workers is positive, but it is far from enough to resolve employment insecurity across the steel industry as a whole.[7] The implementation of the Yellow Envelope Act has strengthened the bargaining rights of subcontractors' unions, but those rights have limits in the face of restructuring by the primary contractor.

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5. Conclusion: The Boom Will End; the Structure Will Remain

In the first half of 2026, the South Korean steel industry finds itself in "unstable survival" sustained by the anesthetic of the AI data center boom. The record exports to the United States, Dongkuk Steel's 403.9% operating profit surge, and Hyundai Steel's swing to consolidated profit all rest on that boom.

But the reality Korean steel will face once it ends is stark:

1. Renewed pressure from the 50% tariff — the price premium disappears once U.S. supply normalizes
2. Persistent Chinese dumping — Chinese crude steel output fell 4.6% in Q1 2026, but excess capacity remains[5]
3. Rising EU CBAM costs — up to KRW 1.9 trillion by 2035
4. Prolonged domestic stagnation — population decline, shrinking construction investment, hollowing out of manufacturing

The dilemma of comprador-monopoly capital becomes clear here. Korean steel survives by relying on America's temporary supply shortage and the state's protective shield (the K-Steel Act, trade adjustment assistance) rather than on global price competitiveness. In this structure, whenever crisis arrives, the cost is borne by workers and taxpayers; whenever the boom comes, the profits are taken by the chaebols.

A genuine transformation of the steel industry is impossible without the dismantling of the monopolistic chaebols, industrial conversion under worker control, and escape from an export structure subordinated to the United States.

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[1] Maeil Business Newspaper, "[Exclusive] Breaking Through the U.S. 50% Tariff... K-Steel's U.S. Exports Hit a 10-Year High", reporter Jeong Ji-seong, 2026.5.15. https://www.mk.co.kr/news/business/12049446

[2] Hana Securities, "Chinese steel demand and supply both expected to decline in 2026", 2026.1.26. https://www.hanaw.com/main/research/research/download.cmd?bbsSeq=1285864

[3] Chosun Biz, "POSCO Holdings Q1 operating profit of KRW 710 billion... up 24% YoY", 2026.4.30. https://biz.chosun.com/industry/company/2026/04/30/XIALBTI6B5HD5PT5JK2OOZPMME ; Moneytoring, "Hyundai Steel records separate operating loss despite Q1 revenue growth". https://moneytoring.ai/mv/1351218/1424578 ; SteelPrice, "Hyundai Steel Q1 2026 operating loss of KRW 72.5 billion... 'swings to deficit'", 2026.4.24. http://www.steelprice.co.kr/news/articleView.html?idxno=61934

[4] SteelBenchmarker, "Global HRC Prices Sustain Upward Trend", 2026.5.13. https://steelbenchmarker.com/history.pdf ; LME, "Steel HRC FOB China (Argus)", May 2026 contract $497.50. https://www.lme.com/metals/ferrous/lme-steel-hrc-fob-china-argus

[5] Choice Economy, "Steel 'dumping exports' worsening amid China's domestic demand slump... 2025 exports 'all-time high'", reporter Hong In-pyo. http://www.choicenews.co.kr/news/articleView.html?idxno=159390 ; Hana Securities, which cites Baowu Group's plan to cut production by 50 million tons.

[6] Daum, "Steel industry hit by 'triple hardships'... plants halt operations as restructuring begins", 2025.6.12. https://v.daum.net/v/20250612225815450

[7] Mindle, "POSCO to directly employ 7,000 partner-company workers... will it become a new model for labor-management relations?", 2026. https://www.mindlenews.com/news/articleView.html?idxno=19579

[8] Kim Seong-hyeok, Democratic Labor Research Institute affiliated with the Korean Confederation of Trade Unions, "Trump's tariff bombshell and the crisis of the Korean steel industry", 2025.6.18. http://www.metalunion.re.kr/bbs/board.php?bo_table=B05&wr_id=206

[9] Naver Premium Content, "CBAM carbon border adjustment mechanism — a cost bomb of up to KRW 2 trillion for Korean steel stocks POSCO and Hyundai Steel", citing MPP analysis. https://contents.premium.naver.com/kimssaminvest/kimssamclass/contents/260512224131572eq

[10] SteelIn, "'K-Steel Act' passes plenary session of National Assembly... full implementation six months after promulgation", 2025.11.27. https://www.steelin.co.kr/news/articleView.html?idxno=12457