Metal Glossary

Designed to be a quick reference guide for customers, the Cashmores glossary provides definitions of the latest metal industry terms.

Metal Glossary

Designed to be a quick reference guide for customers, the Cashmores glossary provides definitions of the latest metal industry terms.
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  • Oil Staining
    Surface staining caused by the partial decomposition during thermal treatment of residual lubricant.
  • Orange Peel
    A roughening, on subsequent cold deformation, of the surface of sheet or strip when the grain size is too coarse. Has the appearance of an orange skin.
  • Orange Peel
    The surface roughening of sheet or strip that develops on subsequent cold deformation if the grain size is too coarse. The appearance is similar to the skin of an orange.
  • Ore
    Bauxite - A red rock found in the earth's crust, close to the surface. Extracted by open-cast mining it is a very rich ore with a 25% yield.
  • Ore
    A mineral that contains a metal, in combination with other elements, which is mined as a source of that metal.
    Related Terms: Chalcocite, Chalcopyrite
  • Ovality
    Any variation from a true circle of the cross section of a round tube, bar or wire.
  • Ovality
    Any difference between the maximum and minimum outside diameters of a tube.
  • Over-ageing
    Artificial ageing treatment at too high a temperature, or for too long a time, after the maximum hardening effect has been achieved. It causes some loss of properties. In some cases it may be a deliberate act, e.g. to improve resistance to stress corrosion or to minimise any further loss of properties in alloys operating at higher temperatures.
  • Oxide Film
    Passive Film
    Generally it is the oxide layer spontaneously formed on the surface of a metal or alloy by its reaction with the oxygen in the atmosphere. Specifically in stainless steels it is the protective chromium oxide film that forms on alloys containing more than 10.5% chromium that is impervious to many corroding media. It is why stainless steels are “stainless”.
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