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Steel is made from iron and carbon. Cast iron is a hard, brittle material that is difficult to work, whereas steel is malleable, relatively easily formed and versatile. On its own, iron is not strong, but a low concentration of carbon – less than 1 percent, depending on the kind of steel – gives steel strength and other important properties.
The two main inputs into iron- and steel-making are a source of iron and a source of energy. Additional requirements are a fluxing material to remove the impurities, and alloy metals to give particular properties to the metal. Raw materials used in US iron and steel production, 2012
Today, electric arc furnaces (EAF) are a common method of reprocessing scrap metal to create new steel. They can also be used for converting pig iron to steel, but they use a lot of electrical energy (about 440 kWh per metric ton), and are thus generally only economical when there is a plentiful supply of cheap electricity. [64]
Example of a supply-chain network. A supply-chain network (SCN) is an evolution of the basic supply chain.Due to rapid technological advancement, organizations with a basic supply chain can develop this chain into a more complex structure involving a higher level of interdependence and connectivity between more organizations, this constitutes a supply-chain network.
Most of the steel produced has been by the growing number of mini-mills, also called specialty mills, which in 2014 numbered 113. In 1981, mini-mills produced an estimated 15% of US steel. [13] Since 2002, steel produced by electric arc furnace, the process used by the mini-mills, has produced more than half the steel made in the US.
Transparency in the supply chain influences how consumers view and support companies, so improving data driven sustainability efforts can positively affect supply chain business. A company’s negative impact on environmental or social areas may show in their stock market value, exposing their true values to investors.
A supply chain is the network of all the individuals, organizations, resources, activities and technology involved in the creation and sale of a product. A supply chain encompasses everything from the delivery of source materials from the supplier to the manufacturer through to its eventual delivery to the end user.
In their analysis, internal connections such as links between a company's purchasing department and the staff responsible for new product development would form part of a supply network, alongside the connections to players within the supply chain. [1] A supplier association can also be seen as a form of supply network. [2]