Tariff Impact Analysis for Nucor

Analysis

Nucor (NUE) has been a primary beneficiary of the U.S. steel trade policy shifts in 2025, specifically the "strengthened" Section 232 tariffs and "reciprocal" tariffs (Liberation Day tariffs) introduced in the first half of the year. Effective March 12, 2025, Section 232 measures reimposed 25% tariffs on steel imports from all sources, which was later supplemented by broader reciprocal tariffs on dozens of trading partners on April 2, 2025. These measures have driven a dramatic reduction in the foreign import share of the U.S. finished steel market, which dropped from approximately 25% at the start of 2025 to an estimated 14% by November 2025.

The reduction in imports has significantly bolstered Nucor's demand profile and backlog. By the end of FY2025, Nucor reported that steel mill backlogs were up nearly 40% year-over-year, while steel products backlogs increased 15%. This sustained demand has allowed the company to guide for a 5% increase in steel mill shipments for FY2026. Management noted that the supply and demand environment in the U.S. has decoupled from world pricing, allowing domestic mills to capture share previously lost to dumped or subsidized imports. In particular, import reductions in key product categories like hot-rolled sheet (down 52% in 2H 2025) and corrosion-resistant sheet (down 48%) have directly supported Nucor's pricing power.

However, the tariff regime has introduced specific headwinds for certain segments of Nucor's business. In the Steel Products segment, management reported higher substrate pricing in 3Q2025, partly driven by increased costs for imported raw materials like steel slabs used at the CSI facility. Nucor has mitigated this by shifting production to internal substrate sources, such as its Gallatin and Crawfordsville mills, to avoid paying higher prices for imported slabs. Additionally, there are observed demand-destruction effects in interest-rate sensitive and export-exposed sectors. Management highlighted that the tariff impact has dampened demand from heavy equipment and agricultural machinery suppliers, which typically consume significant volumes of steel but have faced their own cost pressures from the broader tariff environment.

Looking forward, Nucor expects the full-year impact of these tariffs to continue lowering imported steel levels through 2026. While the company faces elevated pre-operating and startup costs from its massive $20B multi-year investment cycle, the tariff-induced reduction in import competition is expected to provide a tailwind for margins as new high-value capacity—such as the West Virginia sheet mill—ramps up. The company remains focused on lobbying for continued enforcement without exemptions or "loopholes" to maintain the leveled playing field created by the 2025 trade actions.

Data

U.S. Steel Import Market Share Trend (2025)

Source: Earnings Press Release FY-2025, Marvin Labs

Import Reductions by Key Product Category (2H 2025 vs. 2H 2024)

Source: Earnings Press Release FY-2025, Marvin Labs

Nucor Operational Metrics Affected by Tariffs

Source: Transcript FY-2025, Earnings Press Release FY-2025, Marvin Labs

Sources

Foreign import share of the U.S. finished steel market has dropped from approximately 25% at this time last year to 16% in October, and an estimated 14% in November.

We think the tariff impact of that has gotten into those heavy equipment suppliers and agriculture.

operating profit was impacted by... higher substrate pricing... and country-specific tariff negotiations and their impact on raw material cost.