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A milling machine is used to transform pieces of metal into multiple geometric shapes.
The Bessemer process allowed for increased production capacity of steel, decreasing its cost substantially. Before the process was put into practice, steel was too expensive to make bridges and buildings from. So skyscrapers and other large structures have the Bessemer process to thank for their advancement. However, quality issues such as brittleness took away from the viability of steel created in this fashion.
Additionally, steel railroad rails lasted ten times longer than iron ones, so now that steel was affordable railroads would last longer and they could carry much heavier trains.
Metallurgy was important to produce best quality,High usage life things for application in various industries to limit stress on minerals being exploited.