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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  • EN
    Euro Norm, European Standard.
  • Engraving Brass
    CW612N / CZ120 Brass formulated to be best suited for engraving - For example of nameplates and pet’s collar identity discs.
  • Etching
    The production of a uniform matt, surface finish on a work-piece by controlled chemical or electrochemical attack. The etching agent can be either acid or alkali in nature.
  • Etching Test
    The use of a chemical reagent to reveal the macrostructure of a sample from a work-piece. The test is usually made on a cross section from the work-piece so is destructive.
  • ETP
    Electrolytic Tough Pitch, high conductivity, Copper, CW004A (C101).
  • Extrusion
    Direct 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
  • Extrusion
    The process in which a preheated billet is constrained within a strong container in a press and then pushed by a ram through a shaped die. The product, also called an extrusion, has the shape of the die along its whole length. Angles, rectangles, rounds and hexagons are common shapes of extruded bar, whilst tubes are frequently hollow extrusions. With Copper Alloys, extrusion is very often followed by cold drawing to improve tolerances, surface finish and mechanical properties.
  • Extrusion
    The process in which a preheated billet is constrained within a strong container in a press and then pushed by a ram through a shaped die. The product, or extrusion, has the shape of the die along its whole length. Although some simple shapes are extruded in Stainless Steel, this process is most commonly used for Aluminium.
  • Extrusion Die
    Die
    The hardened steel aperture through which a heated extrusion billet is pushed to form an extruded profile shape. There are 3 types of die: Flat Die – For extruding solid shapes Porthole Die – For extruding hollow shapes – This leaves one or two ‘weld’ seams along the length of the extrusion so tube produced in this way is called Welded Tube. Flat Die with Mandrel – For extruding seamless hollow shapes and seamless tube
  • Extrusion Ratio
    The ratio of the cross-sectional area of the extrusion container to that of the extruded product.
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