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2219 (AlCu6Mn, A92219) Aluminum

2219 aluminum is a 2000-series aluminum alloy: the main alloying addition is copper, and it is formulated for primary forming into wrought products. 2219 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-2219. AlCu6Mn is the EN chemical designation. A92219 is the UNS number. Additionally, the AFNOR (French) designation is A-U6MT.

It originally received its standard designation in 1954. This material is well established: the Further Reading section below cites a number of published standards, and that list is not necessarily exhaustive.

It can have the lowest electrical conductivity among 2000-series alloys. In addition, it can have the lowest tensile strength and the lowest thermal conductivity.

The properties of 2219 aluminum include thirteen common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 2219 aluminum to: 2000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

72 GPa 10 x 106 psi

Elongation at Break

2.2 to 20 %

Fatigue Strength

90 to 130 MPa 13 to 18 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

27 GPa 3.9 x 106 psi

Shear Strength

110 to 280 MPa 16 to 41 x 103 psi

Tensile Strength: Ultimate (UTS)

180 to 480 MPa 27 to 70 x 103 psi

Tensile Strength: Yield (Proof)

88 to 390 MPa 13 to 57 x 103 psi

Thermal Properties

Latent Heat of Fusion

390 J/g

Maximum Temperature: Mechanical

230 °C 450 °F

Melting Completion (Liquidus)

640 °C 1190 °F

Melting Onset (Solidus)

540 °C 1010 °F

Specific Heat Capacity

870 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

110 to 170 W/m-K 65 to 99 BTU/h-ft-°F

Thermal Expansion

22 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

28 to 44 % IACS

Electrical Conductivity: Equal Weight (Specific)

81 to 130 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

3.1 g/cm3 200 lb/ft3

Embodied Carbon

8.2 kg CO2/kg material

Embodied Energy

150 MJ/kg 66 x 103 BTU/lb

Embodied Water

1130 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

9.6 to 60 MJ/m3

Resilience: Unit (Modulus of Resilience)

54 to 1060 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

44 points

Strength to Weight: Axial

16 to 43 points

Strength to Weight: Bending

23 to 44 points

Thermal Diffusivity

42 to 63 m2/s

Thermal Shock Resistance

8.2 to 22 points

Alloy Composition

Among wrought aluminum alloys, the composition of 2219 aluminum is notable for containing a comparatively high amount of copper (Cu) and including vanadium (V). Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability. Vanadium is used to reduce grain size and increase recrystallization temperature.

Aluminum (Al) 91.5 to 93.8
Copper (Cu) 5.8 to 6.8
Manganese (Mn) 0.2 to 0.4
Zirconium (Zr) 0.1 to 0.25
Iron (Fe) 0 to 0.3
Silicon (Si) 0 to 0.2
Vanadium (V) 0.050 to 0.15
Titanium (Ti) 0.020 to 0.1
Zinc (Zn) 0 to 0.1
Magnesium (Mg) 0 to 0.020
Residuals 0 to 0.15

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B247: Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings

ASTM B211: Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire

ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

Aluminum Standards and Data, Aluminum Association Inc., 2013

ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993

ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties

EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products