2024 (AlCu4Mg1, 3.1355, 2L97, A92024) Aluminum

2024 aluminum is an alloy of aluminum, further classified within the AA 2000 series (aluminum-copper wrought alloy). 2024 is the Aluminum Association (AA) designation for this material. In European standards, it will typically be given as EN AW-2024. AlCu4Mg1 is the EN chemical designation. A92024 is the UNS number. And 2L97 is the British Standard (BS) designation.

It has 19 common variants, each represented as a separate material.

Material Properties

Base Metal Price17 % rel

Calomel Potential-600 mV

Density3.0 g/cm3 (190 lb/ft3)

Elastic (Young's, Tensile) Modulus73 GPa (11 x 106 psi)

Electrical Conductivity30 % IACS

Electrical Resistivity Order of Magnitude-7 10x Ω-m

Elongation at Break3.5 to 14 %

Melting Onset (Solidus)500 °C (930 °F)

Poisson's Ratio0.33

Shear Modulus28 GPa (4.1 x 106 psi)

Specific Heat Capacity870 J/kg-K

Strength to Weight Ratio67 to 180 kN-m/kg

Tensile Strength: Ultimate (UTS)200 to 550 MPa (29 to 80 x 103 psi)

Tensile Strength: Yield (Proof)100 to 490 MPa (15 to 71 x 103 psi)

Thermal Conductivity120 W/m-K

Thermal Diffusivity46

Thermal Expansion23 µm/m-K

Alloy Composition

Aluminum (Al)90.7 to 94.7 %

Copper (Cu)3.8 to 4.9 %

Magnesium (Mg)1.2 to 1.8 %

Manganese (Mn)0.3 to 0.9 %

Iron (Fe)0 to 0.5 %

Silicon (Si)0 to 0.5 %

Zinc (Zn)0 to 0.25 %

Zirconium (Zr)0 to 0.2 %

Titanium (Ti)0 to 0.15 %

Residuals0 to 0.15 %

Chromium (Cr)0 to 0.1 %

Further Reading

Aluminum Standards and Data, Aluminum Association Inc., 2013

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

ASTM B210: Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes

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

EN 485-2: Aluminium and aluminium alloys. Sheet, strip and plate. Mechanical properties

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

EN 586-2: Aluminium and aluminium alloys. Forgings. Mechanical properties and additional property requirements.

EN 754-2: Aluminium and aluminium alloys. Cold drawn rod/bar and tube. Mechanical properties

EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties

ISO 6361: Wrought Aluminium and Aluminium Alloy Sheets, Strips and Plates