Highlights

• Each F-35 requires over 400 kilograms of rare earth materials critical to military technology.
• F-35 Block 4 upgrade is delayed until 2031 and over budget by $6 billion, with complex procurement challenges.
• China's dominance in rare earth processing represents a significant national security risk for U.S. defense systems.

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The South China Morning Post (SCMP) recently ran with a dramatic headline (opens in a new tab) linking delays in the U.S. F-35 Block 4 fighter jet upgrade to China’s stranglehold on rare earths. The story suggests Beijing’s export restrictions may be slowing America’s premier stealth program. But what’s fact, what’s conjecture, and what’s simply a narrative hook? Perhaps there is some truth, and some exaggeration.

Hard Numbers, Solid Ground

The factual core is clear. Each F-35 requires more than 400 kilograms of rare earth materials, including neodymium, samarium, dysprosium, terbium, and yttrium. These elements are indispensable for permanent magnets, radar systems, stealth coatings, and missile guidance. Lockheed Martin is the largest U.S. user of samarium, with roughly 22.6 kilograms per aircraft. The GAO has confirmed that the Block 4 upgrade program is massively delayed—pushed from 2026 to possibly 2031—and already over budget by US$6 billion. These data points are solid and uncontested. See BreakingDefense (opens in a new tab) and others.

Where Facts Meet Fog

The SCMP article drifts when it attributes those delays directly to China’s export controls. The GAO did not name rare earths as the cause. Instead, the primary bottleneck is Technology Refresh 3 (TR-3), a US$1.9 billion integration package of hardware and software. Suggesting rare earth restrictions as the decisive factor crosses from evidence into speculation. It is plausible—given China’s 99% dominance in processing certain heavy rare earths—but not proven. Here, the piece leverages a geopolitical trope rather than sticking strictly to the audit trail.

Narrative Choices and Implied Bias

The framing leans into a familiar storyline: American military might vulnerable to Chinese supply chokeholds. While true in broad strokes, the direct causal link to F-35 program delays is thin. This selective emphasis amplifies the perception of Chinese leverage, while underplaying the Pentagon’s well-documented struggles with program management, cost overruns, and technology integration. The bias is not outright misinformation—it is in the choice of spotlight. 

Why It Matters for the Supply Chain

Regardless of journalistic shading, the broader point stands: rare earths remain a national security Achilles’ heel. The F-35 is only one platform in a fleet of submarines, missiles, and drones equally dependent on secure supply. Beijing’s quota system, traceability rules, and six-month export licenses underscore the fragility of Western defense procurement. Whether or not current F-35 delays trace to Chinese export policy, the vulnerability is real, and investors, policymakers, and defense planners ignore it at their peril.

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