Tariffs on Steel Leave Defense Contractors Shortchanged

The Hidden Cost of Protectionism

The 25% tariff on imported steel imposes a hidden tax on every shipyard, aerospace supplier, and armor manufacturer that depends on global metals markets. This policy raises the cost of building the Navy's next-generation fleet while shrinking the number of American firms able to bid on Pentagon contracts. A protectionist shield for one industry becomes a strategic vulnerability for another.

Data from the Congressional Budget Office shows that naval shipbuilding costs have climbed faster than inflation for a decade. The Navy's fiscal 2026 shipbuilding request totals $48.6 billion, yet the service still cannot meet its goal of 355 manned battle force ships by 2030. Higher steel prices will not close that gap. They will widen it.

The problem is not abstract. Huntington Ingalls Industries, which builds the Ford-class carriers at its Newport News yard, has warned investors that input costs and supply chain delays are compressing margins. Electric Boat in Groton, Connecticut, faces similar pressure as it scales production of Columbia-class ballistic missile submarines. These are the programs that underwrite American deterrence. They deserve a tax code and a trade policy that do not punish them.

Beyond ships, the Army and Marine Corps rely on steel for vehicles, bridging equipment, and protective structures. The Abrams tank produced at the Lima Army Tank Plant in Ohio requires armor plate from a shrinking supplier base. When tariffs raise the cost of that plate, the Army gets fewer vehicles for the same appropriation. Readiness reports from the Government Accountability Office have repeatedly flagged spare parts shortfalls and maintenance backlogs. Adding a price shock to the supply chain is the opposite of fixing the problem.

Tariff defenders argue that domestic mills need a margin to restart idle furnaces. That argument ignores the long lead times required to produce the high-grade steel used in warships. A standard plate mill cannot simply retool to make HY-80 hull steel or the high-temperature alloys that Pratt and Whitney jet turbines demand. The Defense Department's own industrial base surveys show that only a handful of qualified suppliers exist worldwide. Raising their prices does not create new American capacity overnight.

Allies Are Suppliers, Not Competitors

The administration treats allied steel as a threat to American sovereignty, but the Pentagon's own supply chain maps show that Japan, South Korea, and the United Kingdom provide specialty alloys used in jet engines and submarine hulls. Cutting them off hands market share to domestic mills that cannot produce the required grades at scale. A narrow definition of national security weakens the real thing.

The Defense Department's 2024 industrial base report identified more than 300 critical material shortfalls, including nickel-based superalloys and rare-earth magnets. Tariffs do nothing to expand domestic mining or refining capacity. They merely raise the price of imports while investors wait for permitting reforms that may never arrive. The lag between tariff announcement and domestic production is measured in years, not months.

Strategic stockpiling and targeted domestic investment would address these gaps faster than blanket duties. The Defense Production Act already gives the president tools to accelerate specific programs. Using that authority for mines, mills, and magnet facilities would match the problem with a precise solution. Broad tariffs are a blunt instrument wielded against a target that requires a scalpel.

Consider the example of titanium sponge. Russia and Japan together supplied a large share of the material used in American military airframes before recent sanctions and trade restrictions. Domestic sponge production is limited, and building new capacity takes five to seven years. Tariffs on titanium imports from friendly nations would not accelerate that timeline. They would only force defense contractors to pay more for the same scarce material.

Alliances exist in part because they pool industrial capacity. The Australian submarine agreement with Britain and the United States, known as AUKUS, depends on shared steel, components, and shipyard labor. Tariffs between AUKUS partners would complicate a program already struggling with workforce shortages and cost growth. Treating allies as economic rivals undermines the very defense partnerships that extend American reach without requiring American blood.

Economic Strength Is a Weapon

The United States outspends every rival on defense because its open economy outproduces them and generates the tax revenue that funds a modern military. When trade policy shrinks that advantage through tariffs and retaliatory barriers, it weakens the foundation of American power and emboldens revisionist states. A richer adversary is not required to match the Pentagon dollar for dollar; it only needs to narrow the gap enough to make intervention costly. Tariffs help it do exactly that.

The World Bank estimates that tariff increases implemented in 2025 will shave 0.4 percentage points from global growth this year. Slower growth in Europe and Asia means smaller markets for American farmers, fewer orders for Boeing, and less tax revenue for defense modernization. Mercantilism marketed as muscle flexing leaves the treasury poorer and the fleet older.

Conservatives should return to first principles. Free enterprise, secure supply chains, and disciplined alliances are force multipliers. Protectionism is not. The next time a policymaker promises to punish foreign steel, ask what it costs to armor the ships that keep the peace. The answer will sober anyone who cares about national defense.

The fiscal picture makes the case even clearer. Interest on the national debt now exceeds $1 trillion annually, and Social Security trustees project insolvency within the decade. Every dollar wasted on overpriced steel is a dollar that cannot buy missile defense, hypersonic research, or better pay for enlisted troops. Realists understand that resources are finite. Hawks should start acting like it.

History offers a warning. The Smoot-Hawley Tariff Act of 1930 deepened the Depression, shrank global trade, and left the democracies less prepared for the conflict that followed. No one suggests today's steel duties are identical. But the logic is similar: the belief that closing borders builds strength. In reality, strength flows from innovation, open markets, and productive capacity. A tariff wall does not manufacture any of those things.