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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  • Quenching
    The rapid cooling a metal or alloy from the solution treatment temperature by contact with a solid, a liquid or a gas to retain the hardening constituents in solid solution. Quenching is often carried out by immersion in cold water. Extrusions are quenched after extrusion by air blasts.
  • Recrystallisation Annealing
    A heat treatment that softens a cold worked metal or alloy by complete recrystallisation.
  • Rectification
    Work done to correct dimensional errors.
  • Residual Stress
    Any stress in a finished product after fabrication (mainly cold work) which exists without the presence of any service or external loads, even after stress relieving.
  • Ripple
    Buckle
    The variation in flatness represented by alternate bulges and hollows along the length of a rolled product, the edges of which remain reasonably flat.
  • Rockwell Hardness
    Brinell Hardness, Hardness, Vickers Hardness
    The resistance of a metal to plastic deformation usually by indentation using a diamond or a hardened steel ball. There are various recongnised hardness scales including Vickers (VPN), Brinell and Rockwell. N.B. The empirical, but robust, relationship between hardness and tensile properties that applies in steels does not apply, and the steel tables must not be used for aluminium and its alloys. A less rigorous relationship has been established for some aluminium alloys but it is not widely used.
  • Roller Levelling
    Tension Levelling
    Flattening of sheet, strip or coil metal by passing it through a roll train staggered rolls. Levelling is achieved by precisely bending metal strip back and forth as it's passed through a series of small-diameter offset rolls. The material is usually also under tension loading.
    More information: http://www.thefabricator.com/article/coilprocessing/roller-leveling-101
  • Roller Straightening
    The straightening of extrusions by passage through a series of small diameter, staggered, rolls.
  • Rolling Slab
    Slab
    A cast product that will be used for hot rolling. Size up to 300mm thick, 2000mm wide and 10/15 metres long with weight up to 15 tonnes.
  • Scaffolding Tube
    A ‘welded’ tube, size 1 29/32 inch O/D x 7 swg wall thickness (7swg = 0.176 inch / 4.47mm) used for scaffolding that has been Drift Tested
  • Scalping
    Mechanical removal of oxide and contamination from surface of a cast slab prior to hot rolling.
  • Sealing of Anodic Coatings
    A post anodising treatment to close layer porosity and reduce absorbency.
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