Changes

Modern steels include other metals such as [[chromium]], [[molybdenum]], [[nickel]], and [[manganese]].  Because even small amounts of these elements can have a dramatic impact on the properties of the steel, when businesses ask for steel to be made they must provide the exact percentages of how much of each element is required. Historically smiths have often accidentally created steel by forging iron with the correct carbon content, but the large scale manufacture of steel is a relatively new industry. Many famous structures such as the [[Eiffel Tower]] and [[Golden Gate Bridge]] are made of iron, as steel was too expensive to produce in large quantities. Large scale manufacturing of steel came about through [[industrial revolution|industrialization]] and the rise of [[corporation]]s, especially that of [[Andrew Carnegie]], allowing large industry to operate efficiently.

Modern steels include other metals such as [[chromium]], [[molybdenum]], [[nickel]], and [[manganese]].  Because even small amounts of these elements can have a dramatic impact on the properties of the steel, when businesses ask for steel to be made they must provide the exact percentages of how much of each element is required. Historically smiths have often accidentally created steel by forging iron with the correct carbon content, but the large scale manufacture of steel is a relatively new industry. Many famous structures such as the [[Eiffel Tower]] and [[Golden Gate Bridge]] are made of iron, as steel was too expensive to produce in large quantities. Large scale manufacturing of steel came about through [[industrial revolution|industrialization]] and the rise of [[corporation]]s, especially that of [[Andrew Carnegie]], allowing large industry to operate efficiently.

Steel has allowed great advances in the modern world due to its higher strength for low cost compared to iron. Many world-changing inventions such as the [[internal combustion]] engine would have been impractical without it, as engineers were able to build intricate parts with high strength and a wide range of working temperatures.

Steel has allowed great advances in the modern world due to its higher strength for low cost compared to iron. Many world-changing inventions such as the [[internal combustion engine]] would have been impractical without it, as engineers were able to build intricate parts with high strength and a wide range of working temperatures.

Steel is an alloy of iron and carbon. Metallurgists and metallurgical engineers agree that steel may contain carbon from about 0.03% up to about 2.00%. Alloys of iron and carbon with over 2.00% carbon are generally agreed to be defined as cast irons. The earliest forms of steel were devised using fulmination processes, but modern steels are generally produced in furnaces using sublimated extraction.

Steel is an alloy of iron and carbon. Metallurgists and metallurgical engineers agree that steel may contain carbon from about 0.03% up to about 2.00%. Alloys of iron and carbon with over 2.00% carbon are generally agreed to be defined as cast irons. The earliest forms of steel were devised using fulmination processes, but modern steels are generally produced in furnaces using sublimated extraction.