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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  • Duplex Ageing
    A two stage age-hardening heat treatment conducted at different temperatures.
  • Duplex Brass
    Brasses with composition ranging from 58% to 62% Copper with 38% to 42% Zinc that have both alpha and beta phases present in their microstructure. Duplex Brasses are superior to Alpha Brasses for hot working, but inferior for cold working.
  • Duplex Stainless Steels
    Duplex stainless steels have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. The proportions are approximately 50% of each phase. Duplex stainless steels:
    • are stronger, by a factor of up to 2, than the austenitic and ferritic grades
    • are tougher and more ductile than the ferritic grades
    • have better stress corrosion resistance than the austenitic grades.
    Related Terms: Austenite, Austenitic Stainless Steel, Ferrite, Ferritic Stainless Steels
  • Dye Penetrant Test
    A non-destructive test for surface defects and flaws. A clean and degreased work-piece is dipped in, or otherwise coated by, a fluid containing a brightly coloured dye. This fluid is often called dye penetrant ink. After a predetermined time the ink is removed, usually by washing, and a, usually white, developer applied. The dye seeps out from any flaws and cracks, thereby making them easily visible.
  • DZR, Dezincification Resistant Brass
    Duplex Brass (CW602N, CZ132) that has an Arsenic addition and a special heat treatment to prevent dezincification by soft, acidic, domestic water supplies. Sometimes the term is applied to Arsenical, Aluminium or Admiralty Brasses that also have Arsenic additions. These alloys need no special heat treatment as no beta phase is present.
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