Iron and Steel of Industrial Chemistry

Topics: Steel, Metal, Iron Pages: 2 (556 words) Published: May 2, 2013
Iron, Steel and Aluminium
Main sources of iron:
* second most abundant metal (5% by mass) in Earth’s crust (fourth most abundant element) * found in rock (a mixture of minerals) as one or more minerals (usually a compound) * if a mineral is of economic importance, it is referred to as an ore * iron containing minerals include hematite (Fe2O3), magnetite (FeO·Fe2O3 or Fe3O4), limonite (FeO(OH)·nH2O) and siderite (FeCO3) Alloys:

* homogeneous mixtures of metals or metals and non-metals * examples include brass (65% copper, 35% zinc), solder (63% tin, 37% lead), bronze (85% copper, 15% tin) * usually alloys resist corrosion, and can be harder than either of the metals * the added species interferes with the metallic lattice of cations in the pure metal, and as a result the physical properties of the metal are altered * steels are alloys of iron, with different quantities of carbon and other metals (titanium, chromium, molybdenum, cobalt, nickel, manganese, tungsten) added to create desired properties: * chromium makes steel harder and more resistant to corrosion * manganese makes steel stronger, harder and more resistant to wear * silicon makes steel more resilient

* molybdenum makes steel stronger and harder at high temperatures, less brittle, corrosion resistant and easier to weld * tungsten makes steel extremely hard, even at high temperatures

* Carbon Steel. This is the most widely used kind of steel. Its carbon content is under 2 percent and is usually less than 1 percent. It often also contains a little manganese. * Stainless Steel. This is the most corrosion-resistant kind of steel. It normally contains at least 12 percent (and sometimes up to 30 percent) chromium, and it usually also contains nickel. A very popular stainless steel formulation is 18-8, 18 percent chromium and 8 percent nickel. * Alloy Steels. These contain a little carbon, and sometimes silicon, but they mainly...
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Essay about Alloy: Iron and Steel
  • chemistry Essay
  • Chemistry Essay
  • Zhujiag Iron and Steel Copmany Essay
  • Chemistry Essay
  • Ib Chemistry Analysis of Iron Tablets Essay
  • Iron Ore and Chinese Steel Industry Essay
  • Iron Essay

Become a StudyMode Member

Sign Up - It's Free