AA 2024 T36 Aluminum Alloy – High Strength, Superior Machinability for Aerospace

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	T36	AA Standards, ASTM B211

Mechanical

Property	Value	Condition	Related Standards	Comment
Bending Fatigue Strength	125.0 MPa	T36	AA Standards
Elastic modulus	73.0 GPa	T36	AA Standards, ASTM B211
Hardness, Brinell	130.0 [-]	T36	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	475.0 MPa	T36	AA Standards, ASTM B211
	495.0 MPa	T36	AA Standards

Thermal

Property	Temperature	Value	Condition	Related Standards	Comment
Coefficient of thermal expansion	20 °C	2.3199999999999998e-05 1/K	T36	AA Standards, ASTM B211
	100 °C	2.3199999999999998e-05 1/K	T36	AA Standards, ASTM B211
Melting point		505.0 - 635.0 °C	T36	AA Standards, ASTM B211
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)	T36	AA Standards, ASTM B211

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	17000000.0 - 29000000.0 S/m	T36	AA Standards, ASTM B211
Electrical resistivity	3.45e-08 - 5.88e-08 Ω·m	T36	AA Standards, ASTM B211

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.1 %	T36	AA Standards, ASTM B211
Copper	3.8 - 4.9 %	T36	AA Standards, ASTM B211
Iron	0.50 %	T36	AA Standards, ASTM B211
Magnesium	1.2 - 1.8 %	T36	AA Standards, ASTM B211
Manganese	0.3 - 0.9 %	T36	AA Standards, ASTM B211
Silicon	0.5 %	T36	AA Standards, ASTM B211
Titanium	0.15 %	T36	AA Standards, ASTM B211
Zinc	0.25 %	T36	AA Standards, ASTM B211

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)

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