Iron and steel; a collective term for iron and steel materials and products, often referring to the steel industry.
鉄鋼業はその国の重要な基幹産業だ。
The iron and steel industry is a key foundational sector of that country.
鉄鋼製品の輸出が増加している。
Exports of iron and steel products are increasing.
この工場では鉄鋼を加工して橋の部材を作っている。
This factory processes iron and steel to make bridge components.