Steel is made from iron.

钢是由铁炼成的。

《牛津词典》

In 1920, the United States led the world in iron and steel manufacturing.

美国的钢铁制造业在1920年领先于世界。

《柯林斯英汉双解大词典》

International commerce was therefore dominated by raw materials, such as wheat, wood and iron ore, or processed commodities, such as meat and steel.

因此，国际贸易以原材料（如小麦、木材和铁矿石）和加工商品（如肉类和钢铁）为主。

youdao

The ancestors of many of today's Pittsburghers came from all over Europe to work in the iron and steel factories.

VOA: special.2009.07.13

Iron or steel, 800 million tons, almost a billion tons of steel.

铁或钢，每年8亿吨，几乎接近10亿的钢产量。

麻省理工公开课 - 固态化学导论课程节选

So you pick a better material like iron and steel, that makes a better bridge, we know that now because we have experience with bridges, but still your bridge might fail.

你选择了钢铁作为材料,来造了一座更好的桥,我们现在能够明晰这一点,是因为在造桥这件事上我们现在很有经验,但即使是我们现在造的桥也仍然会倒塌

耶鲁公开课 - 生物医学工程探索课程节选

He added that a successful bid would also deal a blow to China, whose fifth largest steel maker Wuhan Iron and Steel Corporation was seeking to acquire a 40% stake in Riversdale's Zambeze asset.

BBC: Rio Tinto raises bid for Australia's Riversdale

The other significant industrial user is iron and steel production, though iron ore and various other metals used to make alloys are also significant costs.

FORBES: Energy Forecast 2013-2014: Convert to Natural Gas

In 2004, Chinese mills rolled out 273m tonnes of steel, according to the International Iron and Steel Institute.

ECONOMIST: Steelmakers on a roll, until the next glut | The