Jan. 20, 2025
Both 2017 and 2024 are high-strength aluminum alloys, primarily used in aerospace and other structural applications. They share similar characteristics but have significant differences in performance.
| Property | 2017 Aluminum | 2024 Aluminum |
| Strength | Lower tensile strength and fatigue strength, suitable for applications with moderate strength requirements | Higher tensile strength and fatigue strength, suitable for high-stress environments and high-strength applications |
| Ductility and Toughness | Lower elongation to failure, poor ductility, prone to fracture | Higher elongation to failure, better ductility and toughness, performs better under large deformations |
| Corrosion Resistance | Good corrosion resistance, suitable for corrosive environments but still requires protective coatings | Poorer corrosion resistance, usually requires more protective coatings to prevent corrosion |
| Workability and Weldability | Good weldability, but not as easy to weld as 6061 aluminum | Poor weldability, strength decreases after welding, typically used in pre-fabricated applications to reduce post-welding |
Both alloys belong to the 2xxx series, meaning they are copper-based alloys, which enhances their strength.
They exhibit similar mechanical properties in terms of elasticity, shear modulus, thermal conductivity, and expansion.
They have comparable density and intrinsic energy characteristics, making them comparable in terms of environmental impact and material processing.
When high strength and fatigue resistance are essential, 2024 aluminum is usually the preferred choice, while 2017 aluminum is ideal when balancing strength and corrosion resistance, and it offers better weldability in some applications.
| Property | 2017 Aluminum | 2024 Aluminum |
| Elastic (Young's, Tensile) Modulus, GPa | 71 | 71 |
| Elongation at Break, % | 2.2 to 14 | 4.0 to 16 |
| Fatigue Strength, MPa | 92 to 130 | 90 to 180 |
| Poisson's Ratio | 0.33 | 0.33 |
| Shear Modulus, GPa | 27 | 27 |
| Shear Strength, MPa | 120 to 270 | 130 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 200 to 460 | 200 to 540 |
| Tensile Strength: Yield (Proof), MPa | 110 to 290 | 100 to 490 |
| Property | 2017 Aluminum | 2024 Aluminum |
| Latent Heat of Fusion, J/g | 390 | 390 |
| Maximum Temperature: Mechanical, °C | 220 | 200 |
| Melting Completion (Liquidus), °C | 650 | 640 |
| Melting Onset (Solidus), °C | 510 | 500 |
| Specific Heat Capacity, J/kg-K | 880 | 880 |
| Thermal Conductivity, W/m-K | 150 | 120 |
| Thermal Expansion, µm/m-K | 23 | 23 |
| Property | 2017 Aluminum | 2024 Aluminum |
| Electrical Conductivity: Equal Volume, % IACS | 34 | 30 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 100 | 90 |
| Element | 2017 Aluminum | 2024 Aluminum |
| Aluminum (Al), % | 91.3 to 95.5 | 90.7 to 94.7 |
| Chromium (Cr), % | 0 to 0.1 | 0 to 0.1 |
| Copper (Cu), % | 3.5 to 4.5 | 3.8 to 4.9 |
| Iron (Fe), % | 0 to 0.7 | 0 to 0.5 |
| Magnesium (Mg), % | 0.4 to 1.0 | 1.2 to 1.8 |
| Manganese (Mn), % | 0.4 to 1.0 | 0.3 to 0.9 |
| Silicon (Si), % | 0.2 to 0.8 | 0 to 0.5 |
| Titanium (Ti), % | 0 to 0.25 | 0 to 0.15 |
| Zinc (Zn), % | 0 to 0.25 | 0 to 0.25 |
| Zirconium (Zr), % | 0 to 0.25 | 0 to 0.2 |
| Residuals, % | 0 | 0 to 0.15 |
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