Aluminium / Aluminum 2024 Alloy (UNS A92024)

Aluminium / Aluminum alloys have strong corrosion resistance characteristics. These alloys are sensitive to high temperatures ranging between 200 and 250°C (392 and 482°F). An increase in strength takes place when these alloys are exposed at subzero temperatures and strength is lost when these alloys are exposed to high temperatures. Aluminium / Aluminum alloys are good low-temperature alloys.

The following datasheet provides an overview of the Aluminium / Aluminum 2024 alloy.

Chemical Composition

The chemical composition of the Aluminium / Aluminum 2024 alloy is outlined in the following table.

Element Content (%)
Aluminium / Aluminum, Al 93.50
Copper, Cu 4.4
Magnesium, Mg 1.5
Manganese, Mn 0.6

Physical Properties

The following table shows the physical properties of the Aluminium / Aluminum 2024 alloy.

Properties Metric Imperial
Density 2.77 g/cm3 0.10007 lb/in3
Melting point 510°C 950°F

Mechanical Properties

The mechanical properties of the Aluminium / Aluminum 2024 alloy are displayed in the following table.

Properties Metric Imperial
Elastic modulus 70-80 Gpa 10152-11603 ksi
Poisson's ratio 0.33 0.33

Thermal Properties

The thermal properties of the Aluminium / Aluminum 2024 alloy are given in the following table.

Properties Metric Imperial
Thermal expansion (@20-100ºC/68-212ºF) 22.8 (10-6/ºC) 12.71 µin/in°F
Thermal conductivity (@25ºC/77ºF) 190 (W/mK) 1319 BTU in/hr.ft².°F

Other Designations

Equivalent materials to the Aluminium / Aluminum 2024 alloy are given in the table below.

AMS 4037 AMS 4120 AMS 4192 AMS 7223 ASTM B209
ASTM B210 ASTM B211 ASTM B221 ASTM B241 ASTM B316
ASTM F467 ASTM F468 DIN 3.1355 MIL B-6812 QQ A-430
MIL T-50777 QQ A-200/3 QQ A-225/6 QQ A-250/4 MIL T-15089
SAE J454 QQ WW-T-700/3

Fabrication and Heat Treatment

Annealing

Aluminium / Aluminum 2024 alloy is annealed from a heat treated condition between 399 and 427°C (750 and 800°F) for about 2 hours and then cooled slowly in the furnace. This alloy can be annealed between cold working operations at 343°C (650°F) for 2 hours after which the alloy is cooled in air.

Cold Working

Conventional methods are used for cold working Aluminium / Aluminum 2024 alloy. For a sheet that is 1/4" thick, or thinner bend radii of 1/2 to 1 times thickness are suitable. Ductility in the annealed condition is best suited for this alloy. Bend radii of five to six times thickness are suitable for T3 or T4 conditions.

Welding

Inert gas consumable electrode arc method or resistance welding is used to weld Aluminium / Aluminum 2024 alloy. In general, welding of any kind is not recommended for Aluminium / Aluminum 2024 alloy due to degradation of corrosion resistance that occurs as a result of weld heat. If this alloy is welded then the heat treatment should be repeated.

Forging

Aluminium / Aluminum 2024 alloy can be forged, but a reasonable corrosion resistance should be retained by a subsequent heat treatment.

Forming

Conventional methods are used to form Aluminium / Aluminum 2024 alloy. Hot forming is not recommended for this alloy.

Machinability

Aluminium / Aluminum 2024 alloy has good machining characteristics in the heat treated condition. This alloy also has good machining characteristics in the annealed condition. Oil lubricants should be used in the machining process.

Heat Treatment

Aluminium / Aluminum 2024 alloy is an age-hardening and is strengthened during the heat treatment process. The T6 condition is obtained when the alloy is heated at 493°C (920°F) and then quenched for 10 h at 190°C (375°F) and finally cooled in air. The T4 condition is obtained when this alloy is heated at 493°C (920°F) followed by cold water quenching and finally aging at room temperature.

Hot Working

Hot forming is not fully recommended for Aluminium / Aluminum 2024 alloy due to the harmful effect caused by heating upon corrosion resistance.

Hardening

Aluminium / Aluminum 2024 alloy is hardened by a solution anneal and aging method at room temperature or by cold working.

Aging

The T6 condition is attained by heating Aluminium / Aluminum 2024 alloy at 493°C (920°F) followed by water quenching, reheating to 190°C (375°F) and finally cooling the alloy in air. The T4 condition is obtained by heating the alloy at 493°C (920°F) followed by cold water quench. Aging finally occurs at room temperature.

Applications

Aluminium / Aluminum 2024 alloy is used in the manufacture of rivets, truck wheels, crew machine products, aircraft structures, veterinary and orthopedic braces and equipment and scientific instruments.

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Comments

  1. Xinxin Zhang Xinxin Zhang United Kingdom says:

    Hello, I have AA2024-T3 in my lab, but I need 2024-T4.T6 and T8. Can I make 2024-T4,T6,T8 with some heat treatment from 2024-T3?
    Thank you

  2. jeffrey ooi jeffrey ooi Malaysia says:

    should the quenching water be treated with water treatment chemicals ?

  3. Wassfee Thabit Wassfee Thabit United States says:

    What is the number (2024) in AA 2024 alloy standing for?

  4. Wassfee Thabit Wassfee Thabit United States says:

    What is the number (2024) in AA 2024 alloy standing for?

  5. sair ali khan sair ali khan Islamic Republic of Pakistan says:

    Hello my final year project is AA-2024 T6 ageing on effect of heat treatment on mechanical properties. Can any one suggestion me new ideas for this project to improve more properties and also define more hardness.

  6. William Scott William Scott United States says:

    Is there a 2024 T651 grade?

  7. Reem Sabah Reem Sabah Iraq says:

    hello,, i need information about 2024 aluminum alloy in medical field
    thank u

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoM.com.

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