美国内战后发展成为世界最大经济体就是“以钢为纲”

In the years after the Civil War, the American steel industry grew with astonishing speed as the nation’s economy expanded to become the largest in the world. Between 1880 and the turn of the century, American steel production increased from 1.25 million tons to more than 10 million tons. By 1910, America was producing more than 24 million tons, by far the greatest of any country.”

Strong technological foundation was the primary driving force behind the tremendous growth in the steel industry. Steel supply was crucial for rapid expansion of cities and urban infrastructure. Railroads, bridges, factories, buildings, and eventually, in the 20th century, steel was used to make household appliances and automobiles. It was at this time that the US steel industry began using the open-hearth furnace, then, the basic oxygen steelmaking process.

Long after World War II, the American steel service industry continued to flourish and serve as the foundation of the national economy. In 1969, American steel production peaked when the country produced 141,262 ,000 tons. Since then, large steel mills have been replaced by smaller mini-mills and specialty mills, using iron and steel scrap as feedstock, rather than iron ore.

https://www.nationalmaterial.com/brief-history-american-steel-industry/