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13 BCE
The invention of steel
Iron and charcoal were put together. The iron became stronger/ harder when it was left in furnaces filled with charcoal -
6 BCE
Wootz Steel
Craftsman used crucibles to smelt iron with charcoal. -
Coke (Fuel)
Used to smelt iron which replaced the use of wood and charcoal. Both became scarce. -
Steam Engine
Thomas Newcomen built the 1st successful steam engine. -
Steel roller
Henry Cort made the steel roller for the production of steel -
The Bessemer process
Production of steel using molten pig iron. The impurities taken away from iron made stronger steel -
1st skyscraper
The 1st skyscraper was built in Chicago -
Suspention Bridge
The Brooklyn Bridge was open for the public. It had steel wires that held it. -
20th century
Steel production was growing. The military wanted equipment which made the industry grow so much.