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Aluminium Lithium Alloys
Aluminium Lithium Alloys
Aluminium Lithium Alloys

Aluminium lithium alloys are a range of advanced aluminium alloys that usually contain around 2-3% lithium along with copper and magnesium alloying elements. Their key advantage over standard aluminium alloys is a lower density combined with improved elastic modulus. Resistance to fatigue cracking is also generally superior to standard 2000 and 7000 series aluminium alloys. Newer (third generation) aluminium lithium alloys have improved corrosion resistance and greater toughness than their predecessors.

These properties make aluminium lithium particularly suitable to any application where weight to strength ratio is critical and fatigue cracking is a concern. Aerospace and motorsport are typical application areas as well as space exploration where these alloys have been extensively used.

High strengths can be achieved in lithium alloys through precipitation heat treatments that are similar in nature to those used in more standard alloys. However, these processes along with many other aspects of this group of alloys continue to be developed and improved.

Nearest Equivalent Specification

Available Products



A high strength aluminium lithium alloy that has been developed as an alternative to 7075-T6 primarily for use in aircraft structures. In comparison this alloy offers reduction in density of 8% and an elastic modulus that is 10% higher.



An aluminium lithium alloy that has been developed as alternative to 2024-T3 and is often used for applications where outright strength is not a key factor. In comparison this alloys offers a reduction density of 8% and an elastic modulus that is 7% higher.


A high strength aluminium lithium alloy designed to replace many of 2000, 6000 and 7000 aluminium alloys. In the T83 temper this alloy has high strength and excellent corrosion resistance with moderate fracture toughness. In the T8E67 temper strength is reduced but fracture toughness and resistance to fatigue cracking are very high.



A high strength, heat treatable aluminium lithium alloy containing around 1% lithium. Weldability is good and it finds many applications in aerospace, space and some military armour applications. Good fracture resistance at very low temperatures.



A moderate strength aluminium lithium alloy with good corrosion resistance and fatigue properties. Finding many aerospace applications in sheet and plate form particularly for fuselage and lower wing areas where it is replacing 2024 aluminium.



A moderate strength aluminium lithium alloy with strength and corrosion resistance equivalent to 2124 T851 but with improved fatigue and damage tolerance. Well suited to applications where fatigue is a critical consideration such as aerospace frames and spars.



A medium strength aluminium lithium alloy designed as an alternative to 2014 and 2024. In comparison with these alloys density is reduced by approximately 10% and elastic modulus is increased by approximately 11%. Applications for this alloy include use in cryogenic temperatures where mechanical properties are excellent.