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What materials are used to make wind turbines?

According to a report from the National Renewable Energy Laboratory, wind turbines are predominantly made of steel (71-79% of total turbine mass); fiberglass, resin or plastic (11-16%); iron or cast iron (5- 17%); copper (1%); and aluminum (0-2%).

Many turbine components are domestically sourced and manufactured in the United States (Wind Technologies Market Report). Wind turbine towers are 65-85% domestically sourced, blade and hub components are 40-70% domestic, and nacelle assemblies are over 90% domestically sourced. However, many internal parts such as pitch and yaw systems, bearings, bolts, and controllers are typically imported.

Learn more: Wind Energy

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