Steel
Inventor
Inventor Henry Bessemer
Henry Bessemer
Born19 January 1813
Charlton, Hertfordshire
Died15 March 1898 | Age 85
London

Henry Bessemer 1856
Sir Henry Bessemer invented the first industrial process for mass-producing steel inexpensively in 1856. Until the Bessemer-process steel making was slow and labour intensive.


Before Steel

Before cheap steel wrought iron was used for construction. The furnaces heated molten iron, it was then stirred by puddlers using long oar-shaped tools, allowing oxygen to combine slowly remove carbon.
Steel beams made Eiffel Tower possible
Steel beams made Eiffel Tower possible
It was then worked with a forge hammer by the puddler before being rolled into sheets or rails. By 1860, there were over 3000 puddling furnaces in Britain, but the process was slow.

The Process
The Bessemer converter is a cylindrical steel pot approximately 20 feet high, originally with a siliceous lining.
Air is blown in near the bottom, creating oxides of silicon and manganese, which become part of the slag. Within a few minutes an ingot of steel can be produced.

Bessemer Convertor
Bessemer Convertor

Bessemer Converter was instrumental in the production of armaments. Guns, cannons and warships became relatively inexpensive to produce. Steel frames could now be used to build towering skyscrapers.

In America the introduction of the Bessemer Converter had an enormous impact on an expanding society and shrinking the nation. The availability of cheap, durable steel rails allowed pioneers to build over 30,000 miles of railroad and colonise the western part of the country.

Sheet steel could now be used in consumer products like washing machines, electric ovens, refrigerators and the car. By 1914 car manufacturing become the leading consumer of steel.
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In History
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