2024 O Aluminum
What is 2024-O Aluminum?
2024-O aluminum is a variant of the 2024 aluminum alloy in the annealed condition. The "O" here stands for "annealed," which refers to the process of heating the aluminum alloy to a certain temperature and then slowly cooling it. This process relieves internal stresses and results in a lower hardness and enhanced workability.
Characteristics of 2024-O Aluminum
- Lower Strength: Compared to other heat-treated states of 2024 aluminum (such as T3, T4, T6, etc.), 2024-O aluminum has lower strength. The annealing process optimizes its crystal structure and reduces internal stresses in the alloy, but this results in lower strength and hardness compared to other hardened states.
- High Workability: 2024-O aluminum has better workability than other heat-treated forms of 2024 aluminum, making it particularly suitable for applications requiring high formability or weldability.
- Ease of Forming and Machining: Due to its lower strength and hardness, 2024-O aluminum is typically easier to machine and form during the manufacturing process.
- Potential for Further Heat Treatment: After being annealed, 2024-O aluminum can be further strengthened through artificial aging or other heat treatments.
2024 O Aluminum Standards and Designations
Aluminium 2024-O; UNS A92024; ISO AlCu4Mg1; NF A-U4G1 (France); DIN AlCuMg2; AA2024-O, ASME SB211; CSA CG42 (Canada); Al2024-O
2024 O Aluminum Supplied Forms
| Characteristics/Products | 2024-O Aluminum Alclad Sheet | 2024-O Bare Aluminum Sheet |
| Alloy Type | 2024 Aluminum Alloy + Aluminum Clad Layer | 2024 Aluminum Alloy |
| Surface Treatment | Aluminum Clad Treatment (Aluminum Layer Coating) | No Surface Protection (Bare Aluminum) |
| Corrosion Resistance | High (Aluminum Clad Layer Provides Excellent Corrosion Resistance) | Low (Lacks Aluminum Clad Protection, Susceptible to Corrosion) |
| Strength | High (Same as 2024 Aluminum Alloy) | High (Same as 2024 Aluminum Alloy) |
| Formability | Good (Aluminum Clad Surface Provides Excellent Machining Performance) | Good (Suitable for Machining, but No Surface Protection) |
| Applications | Mainly used for aerospace structural components, such as wings, skins, external parts, etc. | Mainly used for internal components or parts not exposed to corrosive environments |
| Suitable Environment | Environments requiring high corrosion resistance, such as humid or seawater environments | Generally unsuitable for corrosive environments, requires additional protective measures |
| Processing Difficulty | Slightly higher (Requires consideration of the aluminum cladding during processing) | Lower (Bare aluminum surface is easy to process) |
2024-O Aluminum Alclad Sheet
2024-O Aluminum Alclad Sheet refers to 2024 aluminum alloy sheet that has been coated with a layer of pure aluminum (Alclad). The Alclad technology allows the 2024 aluminum alloy to maintain its strength and stiffness while providing enhanced corrosion resistance.
Characteristics of 2024-O Aluminum Alclad Sheet
- Alclad Surface Treatment: The aluminum alloy surface is treated with Alclad technology, where a layer of pure aluminum is applied. This pure aluminum layer enhances the corrosion resistance of the sheet, especially in corrosive environments like humidity and saltwater.
- Corrosion Resistance: Compared to bare aluminum alloy, Alclad aluminum sheets exhibit significantly improved corrosion resistance.
- Ductility: The Alclad surface provides excellent formability, making it suitable for the manufacturing of complex aerospace structural components.
Applications of 2024-O Aluminum Alclad Sheet
- Aerospace: Widely used in the external structures of aircraft and spacecraft, such as wings, skins, and external panels.
- Military: Used in military aerospace vehicles, warships, fighter jets, and other components that require high strength and excellent corrosion resistance.
2024-O Bare Aluminum Sheet
2024-O Bare Aluminum Sheet refers to a 2024 aluminum alloy sheet that has not undergone Alclad treatment. This version of the aluminum alloy sheet retains high strength and lightweight properties but lacks the enhanced corrosion resistance provided by the Alclad technology.
Characteristics of 2024-O Bare Aluminum Sheet
- No Surface Protection: Unlike Alclad aluminum sheets, bare aluminum sheets do not have a pure aluminum layer coating. As a result, they are exposed to the air and are more susceptible to corrosion, especially in humid or seawater environments.
- Strength: 2024-O bare aluminum sheets have high strength, but compared to Alclad aluminum sheets, they offer lower corrosion resistance.
- Heat Treatment: The "O" condition indicates that the aluminum alloy has been annealed, resulting in lower strength and better formability, making it suitable for further deep processing.
Applications of 2024-O Bare Aluminum Sheet
- Aerospace: Typically used for non-structural or internal components, or in cases where additional surface protection treatment is required.
- Transportation: Used in high-strength components, but generally requires additional corrosion protection before use.
Chemical Composition of 2024 Aluminum Alloy
| Element | Composition Range |
| Aluminium | 90.7–94.7% |
| Silicon | Max 0.5% |
| Iron | Max 0.5% |
| Copper | Min 3.8%, Max 4.9% |
| Manganese | Min 0.3%, Max 0.9% |
| Magnesium | Min 1.2%, Max 1.8% |
| Chromium | Max 0.1% |
| Zinc | Max 0.25% |
| Titanium | Max 0.15% |
| Other elements | Max 0.05% each, 0.15% total |
Aluminum 2024-O-ASM Material Data Sheet
| Physical Properties | Metric | English | Comments |
| Density | 2.78 g/cc | 0.1 lb/in³ | AA; Typical |
| Mechanical Properties | |||
| Hardness, Brinell | 47 | 47 | AA; Typical; 500 g load; 10 mm ball |
| Ultimate Tensile Strength | 186 MPa | 27000 psi | AA; Typical |
| Tensile Yield Strength | 75.8 MPa | 11000 psi | AA; Typical |
| Elongation at Break | 20 % | 20 % | AA; Typical; 1/16 in. (1.6 mm) Thickness |
| Elongation at Break | 22 % | 22 % | AA; Typical; 1/2 in. (12.7 mm) Diameter |
| Modulus of Elasticity | 73.1 GPa | 10600 ksi | AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus. |
| Ultimate Bearing Strength | 345 MPa | 50000 psi | Edge distance/pin diameter = 2.0 |
| Bearing Yield Strength | 131 MPa | 19000 psi | Edge distance/pin diameter = 2.0 |
| Poisson's Ratio | 0.33 | 0.33 | |
| Fatigue Strength | 89.6 MPa | 13000 psi | AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen |
| Machinability | 30 % | 30 % | 0-100 Scale of Aluminum Alloys |
| Shear Modulus | 28 GPa | 4060 ksi | |
| Shear Strength | 124 MPa | 18000 psi | AA; Typical |
| Electrical Properties | |||
| Electrical Resistivity | 3.49e-006 ohm-cm | 3.49e-006 ohm-cm | AA; Typical at 68°F |
| Thermal Properties | |||
| CTE, linear 68°F | 23.2 µm/m-°C | 12.9 µin/in-°F | AA; Typical; Average over 68-212°F range. |
| CTE, linear 250°C | 24.7 µm/m-°C | 13.7 µin/in-°F | Average over the range 20-300ºC |
| Specific Heat Capacity | 0.875 J/g-°C | 0.209 BTU/lb-°F | |
| Thermal Conductivity | 193 W/m-K | 1340 BTU-in/hr-ft²-°F | AA; Typical at 77°F |
| Melting Point | 502 - 638 °C | 935 - 1180 °F | AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater. Eutectic melting is not eliminated by homogenization. |
| Solidus | 502 °C | 935 °F | AA; Typical |
| Liquidus | 638 °C | 1180 °F | AA; Typical |
| Processing Properties | |||
| Annealing Temperature | 413 °C | 775 °F | |
| Solution Temperature | 256 °C | 493 °F | |
Applications of 2024-O Aluminum
2024-O aluminum is primarily used for products that require high formability and workability during the manufacturing process, rather than being used directly as structural components.
Pre-treatment Material in Processing: 2024-O aluminum is commonly used as raw material that will be further processed into various forms, such as sheets, strips, or other aluminum profiles.
Welding and Forming Applications: Due to its excellent formability and weldability, 2024-O aluminum can be used to create parts with complex shapes, which may later undergo heat treatment to enhance their properties.
2024 O Aluminum Stock
| SKU | Description | Thickness | Width | Length |
| HM020X4X12-20240 | .020 2024-0 Al Sheet | 0.20" | 4" | 12" |
| HM020X4X8-2024-0 | .020x4x8 2024-0 Clad Sheet | 0.20" | 4" | 8" |
| HM020X4X6-2024-0 | .020x4x6 2024-0 Clad Sheet | 0.20" | 4" | 6" |
| HM020X4X4-2024-0 | .020x4x4 2024-0 Clad Sheet | 0.20" | 4" | 4" |
| HM020X2X4-2024-0 | .020x2x4 2024-0 Clad Sheet | 0.20" | 2" | 4" |
| HM020X2X2-2024-0 | .020x2x2 2024-0 Clad Sheet | 0.20" | 2" | 2" |
| HM025X4X12-2024-0 | .025x4x12 2024-0 Clad Sheet | 0.25" | 4" | 12" |
| HM025X4X8-2024-0 | .025 2024-0 Sheet | 0.25" | 4" | 8" |
| HM025X4X6-2024-0 | .025 2024-0 Sheet | 0.25" | 4" | 6" |
| HM025X4X4-2024-0 | .025 2024-0 Sheet | 0.25" | 4" | 4" |
| HM025X2X4-2024-0 | .025 2024-0 Sheet | 0.25" | 2" | 4" |
| HM025X2X2-2024-0 | .025 2024-0 Sheet | 0.25" | 2" | 2" |
| HM032X4X12-20240 | .032 2024-0 Sheet Clad Pvc/1S | 0.32" | 4" | 12" |
| HM032X4X8-2024-0 | .032 2024-0 Aluminum Sheet | 0.32" | 4" | 8" |
| HM032X4X6-2024-0 | .032 2024-0 Aluminum Sheet | 0.32" | 4" | 6" |
| HM032X4X4-2024-0 | .032 2024-0 Aluminum Sheet | 0.32" | 4" | 4" |
| HM032X2X4-2024-0 | .032 2024-0 Aluminum Sheet | 0.32" | 2" | 4" |
| HM032X2X2-2024-0 | .032 2024-0 Aluminum Sheet | 0.32" | 2" | 2" |
| HM125X4X12-20240 | 2024-0 Al Sheet | 1.25" | 4" | 12" |
| HM125X4X8-2024-0 | 2024-0 Al Sheet | 1.25" | 4" | 8" |
| HM125X4X6-2024-0 | 2024-0 Bare Sheet | 1.25" | 4" | 6" |
| HM125X4X4-2024-0 | 2024-0 Bare Sheet | 1.25" | 4" | 4" |
| HM125X2X4-2024-0 | 2024-0 Bare Sheet | 1.25" | 2" | 4" |
| HM125X2X2-2024-0 | 2024-0 Bare Sheet | 1.25" | 2" | 2" |
