515 Warhead

The 515 warhead is a sparse open-source subject, so the most useful treatment is to anchor it in China's missile-warhead modernization rather than overstate unverified details. The DF-21 originated from the JL-1 submarine-launched ballistic missile program and became a road-mobile medium-range ballistic missile, which required a compact re-entry vehicle and a warhead compatible with mobile deployment. FAS describes DF-21 as a solid-fueled system with a 600 kg warhead and nuclear capability, while the 2024 Nuclear Notebook places later Chinese regional nuclear missiles in a broader modernization path. This page should therefore explain 515 as a reported compact warhead associated with China's second-generation delivery systems, with confidence limits clearly visible.

A nuclear warhead like the reported 515 is best assessed by integration qualities: whether it could fit the missile's mass and volume limits, survive launch and re-entry environments, and provide a yield suitable for deterrent missions. The DF-21's move from a JL-1-derived design to a land-based missile made warhead miniaturization and reliable re-entry packaging central technical problems. Public sources do not support confident claims about exact internal design, so the page should avoid speculative physics-package detail. The richer content is the systems context: compact warheads allowed China to move from early large liquid-fueled missiles toward more mobile and survivable solid-fueled regional nuclear forces.

China does not publish a detailed warhead-by-warhead stockpile history, and the 2024 Nuclear Notebook emphasizes the uncertainty that surrounds Chinese nuclear force structure. That matters for the 515 page because the safest historical description is not an inventory claim but a role claim: it belongs to the reported generation of compact warheads linked to JL-1 and DF-21-style delivery systems. As China modernized, older regional nuclear systems were gradually supplemented or replaced by newer missiles and warheads. The page should help readers distinguish between confirmed delivery-system history, estimated warhead characteristics, and uncertain public naming conventions.