3. An Iron Carbon phase diagram explaining the various heat treatments of iron.
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6. Without the mass production of steel, shipping would be miles behind what it is today.
7. Bessemer's process made steel comparably priced to wrought iron. Steel allowed great strides in transportation, shipping, building and weaponry. Higher strength steel components produced more powerful engines, guns, tanks, and naval ships. The mass production of steel led to turbines and generators that made harnessing water and steam power plausible. The effects of Bessemer's process extended across the world and have changed the way we live today. Henry Bessemer Andrew Carnegie
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