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ALLOY CHOICE
PROCESSES
POST FORMING |
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2004 is a heat treatable alloy processed to give excellent superplastic forming properties with component strains in excess of 200% allowing complex detail to be achieved. Typical uses include electronic enclosures, aersopace components and smaller complex form components.
Above: Component from Sea King Mk4 formed using bubble forming in 2004 alloy 2004 can be successfully joined by either TIG or spot welding. Unprotected 2004 has similar corrosion resistance to other copper containing alloys. In most service situations it is necessary to use some form of surface protection. Cladding with pure aluminium is commonly used to enhance the corrosion resistance of these alloys with Clad 2004 being designed to give enhanced corrosion resistance. After superplastic forming, components are normally cleaned by Vaquablasting with 180 grit alumina. This surface has been demonstrated to readily accept surface treatments such as anodic films, chromate conversion coatings and conventional paint systems. |
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