While I believe they receive some kind of coating, Weber themselves refer frequently to them being cast iron. From their site, “how to care for your cast iron

While I believe they receive some kind of coating, Weber themselves refer frequently to them being cast iron. From their site, “how to care for your cast iron cooking grates”. Quoting Weber’s website, “All our 2017 gas grills except for the Summit and Genesis II LX come with porcelain enameled cast iron cooking grates.”. The spec sheet on the site for virtually every gas grill lists a cast iron grate. https://www.weber.com/US/en/blog/tips-techniques/how-to-care-for-your-cast-iron-cooking-grates/weber-29675.html https://www.weber.com/US/en/blog/tips-techniques/how-to-care...