Jan. 20, 2025
2618 Aluminum is suitable for high-end applications that require high strength, high temperature resistance, and high fatigue performance (such as aerospace and racing components), while 6061 Aluminum is more suitable for general industrial and structural applications where moderate strength, good corrosion resistance, and cost sensitivity are important.
| Property | 2618 Aluminum | 6061 Aluminum |
| Strength | Superior tensile and yield strength, ideal for high-stress applications (e.g., aerospace) | Moderate tensile and yield strength, suitable for structural uses |
| Ductility | Moderate ductility, less elongative than 6061, but still offers good balance | Higher elongation, offering more flexibility and formability |
| Fatigue Resistance | Better fatigue strength, suitable for high-stress, cyclic loading applications | Good fatigue resistance, but not as high as 2618 |
| Shear Strength | High shear strength, suitable for components subjected to lateral or torsional loads | Lower shear strength compared to 2618, suited for general use |
| Temperature Resistance | Higher resistance to mechanical failure at elevated temperatures, suitable for engines and aerospace components | Lower temperature resistance, suitable for structural components but not extreme environments |
| Thermal Conductivity | Good thermal conductivity, but lower than 6061 | Slightly better thermal conductivity, ideal for heat dissipation applications |
| Thermal Expansion | Lower thermal expansion coefficient, making it ideal for high-precision applications | Slightly higher thermal expansion, better for less demanding applications |
| Electrical Conductivity | Lower electrical conductivity, not suited for electrical applications | Higher electrical conductivity, better for electrical and electronic applications |
| Corrosion Resistance | More prone to corrosion, requires coating or treatment | Excellent natural corrosion resistance, ideal for outdoor and marine applications |
| Machinability | Requires robust machining processes due to high strength | Easier to machine due to lower hardness and strength |
| Formability | Less formable, maintains strength under stress | More formable, suitable for bending and shaping |
| Applications | Aerospace, automotive (high-performance engine components, aerospace structures) | Construction, transportation, general manufacturing (frames, pipelines, marine components) |
| Cost | More expensive due to specialized properties | More cost-effective, widely available for general use |
| Availability | Less widely available, used for niche high-performance industries | Widely available and versatile for many industries |
| Property | 2618 Aluminum | 6061 Aluminum |
| Elastic (Young's, Tensile) Modulus (GPa) | 71 | 69 |
| Elongation at Break (%) | 5.8 | 3.4 to 20 |
| Fatigue Strength (MPa) | 110 | 58 to 110 |
| Poisson's Ratio | 0.33 | 0.33 |
| Shear Modulus (GPa) | 27 | 26 |
| Shear Strength (MPa) | 260 | 84 to 210 |
| Tensile Strength: Ultimate (UTS) (MPa) | 420 | 130 to 410 |
| Tensile Strength: Yield (Proof) (MPa) | 350 | 76 to 370 |
| Property | 2618 Aluminum | 6061 Aluminum |
| Latent Heat of Fusion (J/g) | 390 | 400 |
| Maximum Temperature: Mechanical (°C) | 210 | 170 |
| Melting Completion (Liquidus) (°C) | 640 | 650 |
| Melting Onset (Solidus) (°C) | 550 | 580 |
| Specific Heat Capacity (J/kg-K) | 880 | 900 |
| Thermal Conductivity (W/m-K) | 160 | 170 |
| Thermal Expansion (µm/m-K) | 22 | 24 |
| Property | 2618 Aluminum | 6061 Aluminum |
| Electrical Conductivity: Equal Volume (% IACS) | 37 | 43 |
| Electrical Conductivity: Equal Weight (% IACS) | 110 | 140 |
| Element | 2618 Aluminum | 6061 Aluminum |
| Aluminum (Al) | 92.4 to 94.9 | 95.9 to 98.6 |
| Chromium (Cr) | 0 | 0.040 to 0.35 |
| Copper (Cu) | 1.9 to 2.7 | 0.15 to 0.4 |
| Iron (Fe) | 0.9 to 1.3 | 0 to 0.7 |
| Magnesium (Mg) | 1.3 to 1.8 | 0.8 to 1.2 |
| Manganese (Mn) | 0 | 0 to 0.15 |
| Nickel (Ni) | 0.9 to 1.2 | 0 |
| Silicon (Si) | 0.1 to 0.25 | 0.4 to 0.8 |
| Titanium (Ti) | 0.040 to 0.1 | 0 to 0.15 |
| Zinc (Zn) | 0 to 0.1 | 0 to 0.25 |
| Residuals | 0 | 0 to 0.15 |
Application Scenario Comparison
| Application Scenario | Recommended Material | Reason |
| Aerospace (aircraft body, engine) | 2618 Aluminum | High strength, high temperature resistance, strong fatigue resistance |
| Automotive high-performance parts | 2618 Aluminum | Can withstand high loads, excellent high-temperature performance |
| Building structural components | 6061 Aluminum | Low cost, good corrosion resistance, easy to process |
| Marine and ocean environments | 6061 Aluminum | Strong corrosion resistance, good thermal conductivity |
| Electronic components (e.g., heat sinks) | 6061 Aluminum | Higher electrical conductivity and thermal conductivity |
| High-precision machined parts | 6061 Aluminum | Excellent machinability, suitable for complex geometric designs |
Selection Criteria
| Selection Criteria | 2618 Aluminum | 6061 Aluminum |
| Mechanical properties | High strength, excellent fatigue resistance, suitable for high-stress, high-load applications (e.g., aerospace components, racing engines). | Moderate strength, suitable for general industrial and structural applications, such as frames, supports, etc. |
| High-temperature performance | Maintains good mechanical performance in high-temperature environments, suitable for jet engines, racing engines, and other high-temperature applications. | Poor high-temperature performance, suitable for environments with relatively low temperatures. |
| Corrosion resistance | Naturally poor corrosion resistance, requires additional surface treatment (such as coatings or anodizing) to enhance corrosion resistance. | Excellent natural corrosion resistance, suitable for marine environments and outdoor applications (e.g., ships, marine engineering, building structures). |
| Machinability | Slightly higher processing difficulty, but still has good machinability, suitable for parts that require high strength. | Excellent machinability, suitable for projects with complex geometric shapes or precision machining, such as mechanical parts or decorative profiles. |
| Electrical conductivity and thermal conductivity | Medium electrical conductivity and thermal conductivity, suitable for scenarios where these properties are not a priority but mechanical performance is. | Higher electrical conductivity and thermal conductivity, suitable for heat sinks, electrical components, and other applications that require high thermal or electrical conductivity. |
| Cost and availability | Higher material cost, typically used in high-end applications with strict performance requirements (e.g., aerospace and high-performance automotive components). | Lower material cost, suitable for budget-sensitive projects, and widely available in the market for various industrial and structural applications. |
| Thermal expansion properties | Low thermal expansion, suitable for applications requiring high-temperature stability and dimensional accuracy. | Higher thermal expansion, suitable for structural components and decorative pieces where dimensional changes due to temperature are not sensitive. |
| Application environment | Suitable for harsh environments, such as high-load, high-fatigue, and high-temperature scenarios (e.g., aerospace engines, racing engines). | Suitable for general environments, especially where corrosion resistance and cost advantages are needed (e.g., construction, ships, mechanical components). |
| Fatigue performance | Excellent fatigue performance, suitable for long-term use under high-frequency vibrations and alternating loads. | Fatigue performance is average, better suited for static loads or low-stress scenarios. |
| Heat treatment capability | Can be strengthened through complex heat treatment, but the process cost is higher. | Good heat treatment effect, simple process, widely used in various states (e.g., T6). |
| Density and weight | Higher density, more widely used in scenarios where lightweight requirements are not as important but high strength is critical. | Lower density, more suitable for structural applications with high lightweight demands (e.g., aircraft frames, vehicle structures). |
Products you may be interested in
Users viewing this material also viewed the following
Recommended Content
Please feel free to write down your requirement in the form below. We will reply you within 24 hours and we will protect your personal privacy information.