Wrought aluminum-copper alloys (2xxx)

Dr. Dmitri Kopeliovich

According to the Wrought aluminum alloys designation system, alloys of this series are designated 2xxx.

This group includes copper (Cu) as the major alloying element.

Silicon (Si), manganese (Mn), magnesium (Mg), nickel (Ni) and titanium (Ti) may be added to the alloys of 2xxx series as minor alloying elements.

Aluminum-copper alloys are heat-treatable.

Solution treatment followed by either artificial or natural aging allows considerable increasing the yield strength (4-6 times). Ductility of the alloy decreases as a result of the heat treatment.

Hardening of the alloys from this group is achieved due to precipitation of the phase Al₂Cu occurring during aging.

Alloys of this series have very high mechanical strength after heat treatment and low corrosion resistance. For increasing corrosion resistance of parts made of aluminum-copper alloys they are clad with pure aluminum or with 6xxx alloys.

Aluminum-copper alloys (2xxx series) are used in aircraft structures and propellers, automotive bodies, screw fittings.

Designation	Si,%	Cu,%	Mn,%	Mg,%	Ni,%	Ti,%	Others,%
2011	0.4 max	5.0-6.0	-	-	-	-	Pb=0.4, Bi=0.4
2014	0.5-1.2	3.9-5.0	0.4-1.2	0.2-0.8	-	0.15 max	-
2017	0.2-0.8	3.5-4.5	0.4-1.0	0.4-0.8	-	0.15 max	-
2018	0.9 max	3.5-4.5	-	0.4-0.9	1.7-2.3	-	-
2024	0. 5 max	3.8-4.9	0.3-0.9	1.2-1.8	-	0.15 max	-
2025	0.5-1.2	3.9-5.0	0.4-1.2	-	-	0.15 max	-
2036	0. 5 max	2.2-3.0	0.1-0.4	0.3-0.6	-	0.15 max	-
2117	0. 8 max	2.2-3.0	0.2-0.5	-	-	-	-
2124	0. 2 max	3.8-4.9	0.3-0.9	1.2-1.8	-	0.15 max	-
2218	0. 9 max	3.5-4.5	-	1.2-1.8	1.7-2.3	-	-
2219	0. 2 max	5.6-6.8	0.2-0.4	-	-	0.02-0.1	V=0.1, Zr=0.18
2319	0. 2 max	5.6-6.8	0.2-0.4	-	-	0.1-0.2	V=0.1, Zr=0.18

(concentration of aluminum - balance)

(Materials Data)

• Wrought aluminum-copper alloy 2011
• Wrought aluminum-copper alloy 2014
• Wrought aluminum-copper alloy 2017
• Wrought aluminum-copper alloy 2024
• Wrought aluminum-copper alloy 2124
• Wrought aluminum-copper alloy 2219

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• Wrought aluminum alloys (1xxx)
• Wrought aluminum-manganese alloys (3xxx)
• Wrought aluminum-silicon alloys (4xxx)
• Wrought aluminum-magnesium alloys (5xxx)
• Wrought aluminum-magnesium-silicon alloys (6xxx)
• Wrought aluminum-zinc-magnesium alloys (7xxx)
• Wrought aluminum alloys
• Wrought aluminum-lithium alloys
• Classification of aluminum alloys
• Temper designation of aluminum alloys
• Effects of alloying elements on properties of aluminum alloys
• Cast aluminum alloys
• Sintered aluminum alloys
• Fluxes for melting aluminum
• Degassing treatment of molten aluminum alloys

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