PRESSURE DIE CASTING ALLOY
ZL5 is a zinc base pressure die casting alloy which conforms to EN 1774 1997 Ingot Specification and is one of a family of versatile high grade zinc alloys:
ZL5 is generally used for castings produced on a hot chamber pressure die casting machine where a slightly stronger and harder alloy than ZL3 is required and dimensional stability in the as cast condition is not such an important criterion. ZL5 has slightly better castability than ZL3 and therefore tends to be used for small intricate castings or when surface preparation of a ZL3 casting is difficult prior to electroplating. Due to its higher Copper content the alloy is more expensive than ZL3 therefore its application should be restricted to its correct use.
ZL5 is easily machined, buffed, polished, lacquered and electroplated for decorative or functional purposes.
The composition of ZL5 conforms to the current EN 1774 Standard, which is now common to all EU countries.
When designing a stressed component using ZL5 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.