鉄鋼|てっこうtekkou[0]heiban (flat)

1. nouniron and steel
   鉄鋼てっこうは基幹産業きかんさんぎょうである。↗

   Steel is a key industry.

• Synonym鋼鉄こうてつNeutralSteel as such, as in 「鋼鉄製」, rather than the iron-and-steel umbrella of 「鉄鋼」; also used figuratively for hardness, as in 「鋼鉄の意志」.
• Synonym鋼はがねNeutralA native Japanese word for steel, often for sword steel or used figuratively, as in 「鋼のメンタル」.
• Related鋼材こうざいNeutralSteel formed into products such as plates, bars and pipes, as in 「鋼材価格」; 「鉄鋼」 is the broad umbrella term for iron and steel as a whole.

Use 「鉄鋼」 for iron and steel as a whole — the industry or the materials in general, as in 「鉄鋼業」. Use 「鋼材」 for formed steel products, 「鋼鉄」 for steel itself or figurative hardness, and 「鋼」, a native word, for swords or figurative strength.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 銑鉄ずくてつ、鋼鉄こうてつ、鋳鉄ちゅうてつなど、鉄てつを主成分しゅせいぶんとする材料ざいりょうの総称そうしょう。