AA 2024-O Aluminum Alloy: Key Standards and Properties

Aluminum AA 2024, known for its use in aircraft industry, is an alloy that offers excellent strength. When in the annealed condition it is readily formed and has good machinability. Though it has a relatively low level of corrosion resistance, it can be machined to a high finish.

Properties

General

Property	Value	Condition	Related Standards
Density	2.78 g/cm³	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316

Mechanical

Property	Value	Condition	Related Standards	Comment
Bending Fatigue Strength	90.0 MPa	O	AA Standards
Elastic modulus	73.0 GPa	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Hardness, Brinell	47.0 [-]	O	AA Standards
Plane-Strain Fracture Toughnes	22.0 - 35.0 MPa·√m			Typical for Wrought 2000 Series Aluminium
Poisson's ratio	0.33 [-]			Typical for Wrought 2000 Series Aluminium
Shear modulus	26.0 - 27.5 GPa			Typical for Wrought 2000 Series Aluminium
Tensile strength	185.0 MPa	O	AA Standards
	220.0 MPa	O	AA Standards, ASTM B209, ASTM B210
	240.0 MPa	O	AA Standards, ASTM B211, ASTM B241, ASTM B316

Thermal

Property	Temperature	Value	Condition	Related Standards	Comment
Coefficient of thermal expansion	20 °C	2.3199999999999998e-05 1/K	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
	100 °C	2.3199999999999998e-05 1/K	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Melting point		505.0 - 635.0 °C	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Specific heat capacity		816.0 - 963.0 J/(kg·K)			Typical for Wrought 2000 Series Aluminium
Thermal conductivity		121.0 - 193.0 W/(m·K)	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	17000000.0 - 29000000.0 S/m	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Electrical resistivity	3.45e-08 - 5.88e-08 Ω·m	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.1 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Copper	3.8 - 4.9 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Iron	0.50 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Magnesium	1.2 - 1.8 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Manganese	0.3 - 0.9 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Silicon	0.5 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Titanium	0.15 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316
Zinc	0.25 %	O	AA Standards, ASTM B209, ASTM B210, ASTM B211, ASTM B241, ASTM B316

Technological properties

Property
Brazing	general: no brazing is known or developed
Corrosion properties	Stress corrosion cracking: Betriebsschäden in Gebieten mit Zugspannungen quer zur Kornstruktur, Eingeschränkte Schäden an Laborproben (T4,T3, T351, T3510, T3511), d (T6, T861, T81, T851, T8510, T8511), general: sufficient, in principle it should be protected
General machinability	General: poor (O), good to acceptable
Workability	general (condition): poor(T4, T3, T351, T3510, T3511, T6), not suitable (T361, T861, T81, T851, T8510, T8511)

AA 2014 T651 Aluminum Alloy: Standards, Properties, and Applications AA 2017 Heat‑Treatable Aluminum Alloy (Grade O) – Standards & Properties

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