Steel Is An Alloy Of Steel

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Introduction. Steel is an alloy which is a mixture of Iron (Fe) and Carbon (C), and has a number of key properties that make it essential in the construction industry; Steel has a strong strength to weight ratio, it’s tough, ductile, resilient, can be welded, and can be formed into complex shapes. Also, steel can be recycled, which is a big factor in how sustainable the material is. 1. The sourcing of raw materials. Steel is an alloy, comprising of Iron and Carbon. Iron ore is extracted from the ground using explosives, which blast the rock into smaller, more manageable pieces. The rock can then be ground up, and magnets are used to separate the iron from the rock. Iron ore reserves cover approximately 5% of the earth’s surface, with…show more content…
In a world where water is becoming scarcer, it’s important for companies to limit the amount of water used in the manufacturing process to ensure sustainability. 3. Embodied energy and CO2. According to researchers at the University of Bath, the energy needed to produce 1kg of Steel is very high – approximately 20MJ. This energy comes from an array of stages in the Steel making process, for example transport and smelting. This database also contains a figure for embodied CO2, where approximately 1.37kg of CO2 is released per 1kg of Steel produced. These figures put Steel near the top of both the embodied energy and embodied CO2 charts for different materials, and in terms of sustainability that’s very poor because despite steel being widely recyclable, it’s very un-environmentally friendly to produce which can mean it’s deemed unsustainable. Obviously the embodied energy and carbon for steel depends on a number of factors such as transportation, but generally it has a high embodied energy and CO2 because of the processing required to produce it. 4. The production of waste and by-products during manufacture/processing. According to Bluescope Steel, a steel producer based in Australia, approximately 360kg of by-products are produced per tonne of steel. This could be anything from methane gas to blast furnace slag, and come from different stages of the steel making process. Some of this
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