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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  • Diffusion Staining
    Patchy surface discolouration that can occur as a result of diffusion in clad material.
  • DIN
    The prefix for German National Standards, also the German National Standards Organisation.
  • Direct Extrusion
    Extrusion
    The extrusion process in which a preheated billet is placed in the container and is pushed by the ram through the stationary die to form the extruded section.
    Related Terms: Container
  • Directional Properties
    Deformation by cold working causes changes to the grain structure and, sometimes, variations in mechanical properties across and along a work-piece. Properties measured along the direction of deformation are described as longitudinal, whilst those measured at a right angle to the direction of working are called transverse.
  • Drawing
    Cold Drawing
    The pulling of a work-piece through a fixed die at room temperature. It can reduce the size, change the cross section or shape, improve surface finish, improve tolerances or work-harden the material.
  • Drawing
    A process carried out at room temperature where extrusion is pulled through a die to improve tolerances, surface finish and mechanical properties.
  • Drawn Tube
    A hollow product of uniform wall thickness, produced by cold drawing.
    Related Terms: Cold Drawing, Drawing
  • Drift Test
    Flaring Test
    A test for the weld integrity of a welded tube, usually carried out to BS1139. All batches of Scaffolding Tube undergo this test.
    Related Terms: Scaffolding Tube
  • DSTAN, DEFSTAN
    Defence Standards
  • DTD
    Director of Technical Development. The prefix for material standards used by the British Army, RAF and other defence applications.
  • Ductility
    The ability of a metal or alloy to deform without cracking or failing under tensile loads. Materials with low ductility exhibit brittle behaviour and fail at more modest loads.
  • Ductility
    The ability of a metal or alloy to deform without cracking or failing under tensile loads. Materials with low ductility exhibit brittle behaviour and fail at more modest loads. Ductility typically decreases at lower temperatures and most materials will become brittle below a certain temperature called the Ductile-Brittle Transition.
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