Harder-Aluminium Copper

Al-Cu master alloy is widely used as a hardener in all aluminium industry for substantial increases in strength and facilitates precipitation hardening and also for some structural application. Copper has a low solubility in aluminum at low temperatures. An alloy quenched from high temperatures to retain the copper in solid solution will therefore be metastable and hence the copper will tend to precipitate forming GP Zones.
● Refer attachment for product specification