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Aluminium alloys for moulding
In order to be defined as such, Aluminium Alloys for moulding (selected alloys) must posses the following essential features:
- be available in sizeable thicknesses (at least 400 mm,
thicknesses which are not standard in the production of
Aluminium plates).
- the adequate mechanical characteristics along the entire
thickness of the plate (without "sinking" at the core) must be
constant.
- feature considerable size stability, even when the shavings have
been removed.
- be fit to undergo sometimes necessary treatments such as:
welding, photo-engraving, chemical nickel-plating, etc.
The following diagram shows the various families of Aluminium alloys in general: the 4-digit numeric name of the families (5xxx, 6xxx, 2xxx, 7xxx, which correspond to alloys such as 5083, 6082, 2017, 7075) refers to the EN-AW international standard.
Within these families it is possible to find various Selected Aluminium Alloys to which manufacturers normally associate distinctive brand names (e.g. FIBRAL®, CERTAL® SPC. etc.)
The main Aluminium Alloys for Moulding are in the so-called II Generation 7xxx family (alloys with grain refining elements, for better hardening in depth and shaving compactness). Others can be found in the 2xxx family (with hardeners) or the 5xxx family, which can offer correct applications, but only for small series' or low pressure processes (such as RIM).
For further information regarding Aluminium alloys supplied by Alcan for the production of moulds see the relative section in our Library area of the site.
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From Old Tooling 