noun which may take the genitive case particle 'no'
made of steel; steel
Used as a no-adjective to describe objects constructed from steel. Common in product descriptions and technical contexts.
この橋は鋼鉄製です。
This bridge is made of steel.
鋼鉄製の扉はとても重い。
The steel door is very heavy.
スチール製 is a common loanword equivalent, often used in casual or commercial contexts.
Compound of 鋼鉄 (steel) + 製 (made of).