2219-T62 Aluminum vs. 2219-T81 Aluminum
2219 aluminum alloy is a high-strength aluminum-copper alloy, primarily used in aerospace applications, especially in high-temperature structures and high-stress environments. Its different heat treatment states significantly affect its properties, with 2219-T62 and 2219-T81 being two common heat treatment states.
- 2219-T81 is an aluminum alloy with high strength and good shear performance, suitable for applications requiring high load-bearing capacity, particularly in aerospace structural components.
- 2219-T62 has better ductility and electrical conductivity, making it suitable for applications that require high toughness and conductivity but have lower mechanical performance requirements.
2219-T81 and 2219-T62 Aluminum Alloy Performance Comparison Table
| Property | 2219-T81 | 2219-T62 |
| Tensile Strength (UTS) | Higher, stronger, suitable for high-stress applications | Lower, but still suitable for general aerospace applications |
| Yield Strength | Higher, suitable for bearing larger loads | Lower, suitable for applications with lighter loads |
| Shear Strength | Higher, suitable for applications with higher shear forces | Lower, suitable for general shear applications |
| Elongation to Fracture | Lower, more rigid | Higher, suitable for applications requiring good ductility and toughness |
| Electrical Conductivity | Lower | Higher, suitable for applications requiring good electrical conductivity |
| Application Field | High-strength aerospace structural components (such as shells, supports, etc.) | Aerospace frames, bulkheads, lighter load components |
| Advantages | High strength, high shear resistance, suitable for high-stress environments | Good ductility and electrical conductivity, suitable for applications requiring toughness and conductivity |
| Disadvantages | Lower elongation to fracture, poor electrical conductivity | Slightly lower strength, suitable for lighter load applications |
2219-T62 Aluminum vs. 2219-T81 Aluminum Mechanical Properties
| Property | 2219-T62 Aluminum | 2219-T81 Aluminum |
| Elastic (Young's, Tensile) Modulus, GPa | 72 | 72 |
| Elongation at Break, % | 8.5 | 8.0 |
| Fatigue Strength, MPa | 110 | 110 |
| Poisson's Ratio | 0.33 | 0.33 |
| Shear Modulus, GPa | 27 | 27 |
| Shear Strength, MPa | 250 | 270 |
| Tensile Strength: Ultimate (UTS), MPa | 420 | 470 |
| Tensile Strength: Yield (Proof), MPa | 290 | 350 |
2219-T62 Aluminum vs. 2219-T81 Aluminum Thermal Properties
| Property | 2219-T62 Aluminum | 2219-T81 Aluminum |
| Latent Heat of Fusion, J/g | 390 | 390 |
| Maximum Temperature: Mechanical, °C | 230 | 230 |
| Melting Completion (Liquidus), °C | 640 | 640 |
| Melting Onset (Solidus), °C | 540 | 540 |
| Specific Heat Capacity, J/kg-K | 870 | 870 |
| Thermal Conductivity, W/m-K | 120 | 120 |
| Thermal Expansion, µm/m-K | 22 | 22 |
2219-T62 Aluminum vs. 2219-T81 Aluminum Electrical Properties
| Property | 2219-T62 Aluminum | 2219-T81 Aluminum |
| Electrical Conductivity: Equal Volume, % IACS | 30 | 29 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 86 | 85 |
Comparison of 2219-T62 Aluminum and 2219-T81 Aluminum Applications
- 2219-T81: Due to its higher strength and better shear resistance, 2219 aluminum in the T81 state is more suitable for aerospace structural components that require high strength and high performance, such as spacecraft shells, engine mounts, and other parts subjected to high loads.
- 2219-T62: 2219 aluminum in the T62 state is typically used in areas where strength requirements are slightly lower but toughness, ductility, and electrical conductivity are more critical. It is commonly found in aerospace components or structures that are not subjected to high stresses, such as aircraft fuselage frames, bulkheads, etc.
Comparison of 2219-T81 and 2219-T62 in Aerospace Applications
| Property | 2219-T81 | 2219-T62 |
| Strength | Higher, suitable for bearing large loads and high-stress environments | Slightly lower, suitable for medium-stress applications |
| Shear Resistance | Better, suitable for components subjected to high shear forces | Lower, suitable for components with lower shear force requirements |
| Ductility | Poorer, suitable for structures that do not require large deformations | Better, suitable for components requiring good deformation and toughness |
| Electrical Conductivity | Lower | Higher, suitable for electronic and electrical applications |
| Typical Applications | Spacecraft shells, engine mounts, high-load structural components | Aircraft fuselage frames, bulkheads, structural components with lighter loads |
The high strength and shear resistance of 2219-T81 aluminum make it particularly suitable for use in high-stress and high-load environments, typically in aerospace structural components such as spacecraft shells, engine mounts, and other heavily loaded parts. On the other hand, 2219-T62 aluminum offers better toughness, ductility, and electrical conductivity, making it suitable for aerospace components that require less strength but need good ductility and electrical conductivity, such as aircraft fuselage frames, bulkheads, and some electrical and electronic applications.
Advantages and Disadvantages of 2219-T62 Aluminum and 2219-T81 Aluminum
Advantages and Disadvantages of 2219-T81 Aluminum
- Advantages: Higher strength (tensile and yield), better shear strength, suitable for high-strength applications.
- Disadvantages: Lower elongation to fracture, poorer electrical conductivity.
Advantages and Disadvantages of 2219-T62 Aluminum
- Advantages: Better elongation to fracture and electrical conductivity, suitable for lighter load or toughness-demanding applications.
- Disadvantages: Slightly lower strength than T81, especially under extreme loads.
