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 mm2/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.
| Al | 91.5 to 93.8 | |
| Cu | 5.8 to 6.8 | |
| Mn | 0.2 to 0.4 | |
| Zr | 0.1 to 0.25 | |
| Fe | 0 to 0.3 | |
| Si | 0 to 0.2 | |
| V | 0.050 to 0.15 | |
| Ti | 0.020 to 0.1 | |
| Zn | 0 to 0.1 | |
| Mg | 0 to 0.020 | |
| res. | 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