Ferromagnetic
Cookware that contains iron and is therefore compatible with induction cooking.
Definition
Ferromagnetic refers to materials that are strongly attracted to magnets — primarily iron and many steels. Induction cooktops generate an alternating magnetic field that induces electrical eddy currents in ferromagnetic cookware, heating the cookware directly. Pure aluminum, copper, glass, and most stainless steel grades (300-series) are not ferromagnetic and will not heat on an induction cooktop. To test cookware: hold a magnet to the bottom; if it sticks firmly, the pan will work. Cast iron, carbon steel, and induction-rated stainless steel (often labeled '18/0' or with an induction symbol) are the standard induction-compatible options.
Where this term appears
Ferromagnetic comes up in product spec sheets, service reports, and troubleshooting documentation across most major appliance brands. If you encountered it in a manual or a service description and want context for how it fits into the larger picture, the related articles in the sidebar drill into the practical details. The glossary as a whole is intended as a quick lookup reference; for a deep dive on any specific topic, jump to the related buying guide or troubleshooting article.