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Stainless steel casting manufacturer & Exporter. |
| Date Added: August 19, 2010 11:03:18 AM |
| Author: Amit Jain |
| Category: Business & Economy: Organizations |
| Steel is a metal alloy whose major component is iron, with carbon being the primary alloying material. Carbon acts as a hardening agent, preventing iron atoms, which are naturally arranged in a lattice, from sliding past one another. Varying the amount of carbon and its distribution in the alloy controls the qualities of the resulting steel. Steel with increased carbon content can be made harder and stronger than iron, but is also more brittle. One classical definition is that steels are iron-carbon alloys with up to 5.1 percent carbon; ironically, alloys with higher carbon content than this are known as iron. Currently there are several classes of steels in which carbon is replaced with other alloying materials, and carbon, if present, is undesired. A more recent definition is that steels are iron-based alloys that can be plastically formed (pounded, rolled, etc.). Iron, like most metals, is not found in the Earth’s crust in a native state. Since the rise of the cyan bacteria and their excretion of oxygen into the atmosphere, iron can be found only in oxide form, typically Fe2O3— the form of iron oxide found as the mineral hematite. Iron oxide is soft sandstone -like material with limited uses on its own. Iron is extracted from ore by removing the oxygen by combining it with a preferred chemical partner such as carbon. This process, known as smelting, was first applied to metals with lower melting points. Copper and tin both melt at just over 1000 °C , temperatures that could be reached with ancient methods that have been in use for at least 6000 years (since the Bronze Age). Since the oxidation rate itself increases rapidly beyond 800 °C, it is important that smelting take place in a fairly oxygen-free environment. Unlike copper and tin, liquid iron dissolves carbon quite readily, so that smelting results in an alloy containing too much carbon to be called steel. Kesri Steels Limited is a Manufacturer and Exporter of Carbon steel, Alloy steel, Manganese steel, Stainless steel and Special steel Castings, Ingots, Round Bars, Square Bars, Flat Bars and Forged Bars for diversified engineering applications. Kesri Steels Limited is customer focused, innovative and value-driven company, which manufactures, processes and delivers Steel products to their valuable customers worldwide. |
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