Large Castings for Wind Turbines

Research output: NRELTechnical Report


This analysis uses the Renewable Energy Materials Properties Database to examine supply considerations for two parts of a wind turbine, the hub and bedplate. Each of these cast iron components is cast as a single large piece up to 4 m across (for land-based turbines) or 8 m (offshore). Close to 5,000 hubs and bedplates have been installed per year in the United States and meeting the nation's clean energy goals could increase that number to 12,000-20,000 per year in the next decade. These parts are currently imported, but growing demand for wind turbine components may provide opportunities for domestic manufacturers.
Original languageAmerican English
Number of pages13
StatePublished - 2023

NREL Publication Number

  • NREL/TP-5000-84438


  • bedplate
  • cast iron
  • hub
  • manufacturing
  • wind energy


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