The Role of Steel in Global Revolutions Dr. Gautam recalled how steel has been instrumental in history. He also spoke about Andrew Carnegie, who discovered hot-rolled steel in the United States in the 1880s and revolutionized the railway and industrial sectors. It became the backbone of the Industrial Revolution, which connected the country and sparked economic growth. He also said t... https://lite.evernote.com/note/d8e7be8c-4d54-f1c1-6efd-f0b2606562d8