AA 2024 T4 Aluminum Alloy – High Strength, Excellent Machinability

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	T4	AA Standards, ASTM B209, ASTM B211

Mechanical

Property	Value	Condition	Related Standards	Comment
Bending Fatigue Strength	140.0 MPa	T4	AA Standards
Elastic modulus	73.0 GPa	T4	AA Standards, ASTM B209, ASTM B211
Hardness, Brinell	120.0 [-]	T4	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	425.0 MPa	T4	AA Standards, ASTM B209, ASTM B211
	472.0 MPa	T4	AA Standards

Thermal

Property	Temperature	Value	Condition	Related Standards	Comment
Coefficient of thermal expansion	20 °C	2.3199999999999998e-05 1/K	T4	AA Standards, ASTM B209, ASTM B211
	100 °C	2.3199999999999998e-05 1/K	T4	AA Standards, ASTM B209, ASTM B211
Melting point		505.0 - 635.0 °C	T4	AA Standards, ASTM B209, 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)	T4	AA Standards, ASTM B209, ASTM B211

Electrical

Property	Value	Condition	Related Standards
Electrical conductivity	17000000.0 - 29000000.0 S/m	T4	AA Standards, ASTM B209, ASTM B211
Electrical resistivity	3.45e-08 - 5.88e-08 Ω·m	T4	AA Standards, ASTM B209, ASTM B211

Chemical properties

Property	Value	Condition	Related Standards
Chromium	0.1 %	T4	AA Standards, ASTM B209, ASTM B211
Copper	3.8 - 4.9 %	T4	AA Standards, ASTM B209, ASTM B211
Iron	0.50 %	T4	AA Standards, ASTM B209, ASTM B211
Magnesium	1.2 - 1.8 %	T4	AA Standards, ASTM B209, ASTM B211
Manganese	0.3 - 0.9 %	T4	AA Standards, ASTM B209, ASTM B211
Silicon	0.5 %	T4	AA Standards, ASTM B209, ASTM B211
Titanium	0.15 %	T4	AA Standards, ASTM B209, ASTM B211
Zinc	0.25 %	T4	AA Standards, ASTM B209, 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)

AA 6061 T4 – High‑Performance Aluminum Alloy for Welding, Brazing & Anodizing AA 2017 T451 Aluminum Alloy – Heat‑Treatable Grade with Superior Strength & Machinability

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