might just be confusion due to words being weird. steel is an alloy, which means its a metal. but some people think of the periodic table classification of metals and think a metal has to be a single element. but no, metals have certain properties: thermal and electrical conductivity, ductility, and malleability. thus, alloys are metals. even nonmetals like iodine and hydrogen become metals at high pressures. also some metals like sodium can become nonmetallic at the right temp and pressure

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