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Needle coke
What it is
A premium petroleum or coal-tar derived coke with a needle-like crystalline structure, the essential feedstock for graphite electrodes. Its low thermal expansion is what lets an electrode survive the thermal shock of arc melting
Global supply is concentrated among a few producers, and captive needle coke is the key differentiator among electrode makers
Impact on industries
- The dominant cost input and a chronic supply chokepoint - electrode margins are set as much by coke sourcing as by electrode pricing
- Captive needle coke is a decisive competitive advantage; fewer than six global players hold it alongside large-diameter machining capability
- Petroleum coke prices have strengthened through 2026, raising carbon product costs while downstream steel demand stayed weak - a margin squeeze from both ends
- Needle coke also feeds lithium-ion anode production, so battery demand now competes with electrodes for the same constrained feedstock