5383-O Aluminum vs. 5456-O Aluminum
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5383 O Aluminum and 5456-O Aluminum are both annealed (O state) versions of aluminum alloys. Their alloy compositions are almost identical, but there are differences in certain mechanical properties and thermal performance.
5383-O and 5456-O are both annealed (O state) aluminum alloys, meaning they are soft and have been heat-treated to achieve maximum formability. Their chemical compositions are very similar, but they differ slightly in mechanical performance, formability, and thermal behavior.
- When high formability and ductility are required, 5456-O is the better choice, especially in applications involving deep drawing, complex shapes, and high strength demands.
- When high-temperature resistance is crucial, such as for components exposed to high temperatures in marine or industrial environments, 5383-O is the better choice, although its formability and flexibility may be slightly lower.
Both alloys have excellent corrosion resistance and are ideal for marine and industrial environments, but specific application requirements (such as forming complexity or temperature exposure) will determine the better choice.
5383-O Aluminum and 5456-O Aluminum Comparison
| Property | 5383-O Aluminum | 5456-O Aluminum |
| Formability & Ductility | Good, but less than 5456-O | Excellent, superior ductility and formability |
| Tensile Strength | Moderate | Higher tensile strength |
| Shear Strength | Moderate | Slightly higher shear strength |
| Temperature Resistance | Slightly better | Good, but less than 5383-O |
| Electrical Conductivity | Similar to 5456-O | Similar to 5383-O |
| Corrosion Resistance | Excellent (marine) | Excellent (marine) |
| Primary Applications | High-temperature environments, marine, structural components | Pressure vessels, tanks, marine structures, aerospace |
5383-O Aluminum vs. 5456-O Aluminum Mechanical Properties
- Ductility: The ductility of 5456-O aluminum (18%) is significantly higher than that of 5383-O aluminum (15%), making 5456-O perform better in applications requiring higher formability.
- Tensile Strength: The ultimate tensile strength of 5456-O aluminum (320 MPa) is slightly higher than that of 5383-O aluminum (310 MPa).
- Shear Strength: The shear strength of 5456-O aluminum (200 MPa) also exceeds that of 5383-O aluminum (190 MPa), giving 5456-O an advantage in applications requiring higher shear strength.
| Property | 5383-O Aluminum | 5456-O Aluminum |
| Brinell Hardness | 85 | 80 |
| Elastic (Young's, Tensile) Modulus, GPa | 68 | 68 |
| Elongation at Break, % | 15 | 18 |
| Fatigue Strength, MPa | 160 | 160 |
| Poisson's Ratio | 0.33 | 0.33 |
| Shear Modulus, GPa | 26 | 26 |
| Shear Strength, MPa | 190 | 200 |
| Tensile Strength: Ultimate (UTS), MPa | 310 | 320 |
| Tensile Strength: Yield (Proof), MPa | 150 | 150 |
5383-O Aluminum vs. 5456-O Aluminum Thermal Properties
| Property | 5383-O Aluminum | 5456-O Aluminum |
| Latent Heat of Fusion, J/g | 390 | 390 |
| Maximum Temperature: Corrosion, °C | 65 | 65 |
| Maximum Temperature: Mechanical, °C | 200 | 190 |
| Melting Completion (Liquidus), °C | 650 | 640 |
| Melting Onset (Solidus), °C | 540 | 570 |
| Specific Heat Capacity, J/kg-K | 900 | 900 |
| Thermal Conductivity, W/m-K | 130 | 120 |
| Thermal Expansion, µm/m-K | 24 | 24 |
5383-O Aluminum vs. 5456-O Aluminum Electrical Properties
In terms of electrical conductivity, both perform equally, with the same electrical conductivity, so their performance is identical in electrical applications.
| Property | 5383-O Aluminum | 5456-O Aluminum |
| Electrical Conductivity: Equal Volume, % IACS | 29 | 29 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 97 | 97 |
5383-O Aluminum vs. 5456-O Aluminum Alloy Composition
From the alloy composition perspective, the main difference between the two is the content of magnesium (Mg) and chromium (Cr). 5456-O aluminum has a slightly higher magnesium content, offering slightly stronger corrosion resistance and higher ductility.
| Element | 5383-O Aluminum | 5456-O Aluminum |
| Aluminum (Al), % | 92 to 95.3 | 92 to 94.8 |
| Chromium (Cr), % | 0 to 0.25 | 0.050 to 0.2 |
| Copper (Cu), % | 0 to 0.2 | 0 to 0.1 |
| Iron (Fe), % | 0 to 0.25 | 0 to 0.4 |
| Magnesium (Mg), % | 4.0 to 5.2 | 4.7 to 5.5 |
| Manganese (Mn), % | 0.7 to 1.0 | 0.5 to 1.0 |
| Silicon (Si), % | 0 to 0.25 | 0 to 0.25 |
| Titanium (Ti), % | 0 to 0.15 | 0 to 0.2 |
| Zinc (Zn), % | 0 to 0.4 | 0 to 0.25 |
| Zirconium (Zr), % | 0 to 0.2 | 0 |
| Residuals, % | 0 | 0 to 0.15 |
5383-O Aluminum and 5456-O Aluminum Corrosion Resistance
Both alloys exhibit excellent corrosion resistance, especially in marine environments. Due to their high magnesium content, they have strong resistance to seawater and other corrosive elements. This makes both 5383-O and 5456-O suitable for marine and coastal applications, such as hulls, fuel tanks, and other structures exposed to saltwater.
5383-O Aluminum and 5456-O Aluminum Applications
| Aluminum Alloy Type | Application Description |
| 5456-O Aluminum | 5456-O aluminum alloy is widely used in various fields requiring complex shapes and high toughness due to its excellent formability and ductility. It is commonly used for manufacturing pressure vessels, marine structures, and shipbuilding components, as it shows good workability and strength during welding. Additionally, 5456-O aluminum is often used in welding fuel tanks and storage tanks, as well as in some aerospace applications requiring highly complex parts. |
| 5383-O Aluminum | 5383-O aluminum alloy offers superior high-temperature performance and similar strength, making it particularly suitable for applications in high-temperature environments. It is widely used in marine environments where high-temperature resistance is required, capable of withstanding extreme seawater corrosion and temperature fluctuations. This alloy is also particularly well-suited for structural components in hot environments, especially for applications where high-temperature strength is critical, such as ship and offshore platform components exposed to high temperatures. |
Further reading: 5083 5383 O H112 Marine Grade Aluminum Bars 5456 5454 5754 Marine Grade Aluminum Bar 5383 Marine Grade Aluminum Plate Sheet 5456 Marine Grade Aluminum Plate Sheet Marine Grade Aluminum Round Bar 5754 5454 5456 5456 H111 Aluminum 5456 H112 Aluminum 5456 H116 Aluminum 5456 H32 Aluminum 5456 H321 Aluminum 5456 O Aluminum 5383 H112 Aluminum 5383 H321 Aluminum 5383 H116 Aluminum 5383 H34 Aluminum 5383 H32 Aluminum 5383 H111 Aluminum 5383 O Aluminum
