7075-T651 vs. 7075-T6510 Aluminum: Key Differences and Applications
7075 T651 and 7075-T6510 are both high-strength aluminum alloys, but they have slightly different characteristics, making them suitable for different application fields.
- If the application requires higher ductility and the material must maintain its integrity under deformation, 7075-T651 is an ideal choice.
- If higher strength and fatigue resistance are needed, especially in environments with repeated loading, 7075-T6510 has an advantage.
7075 aluminum alloy is a commonly used high-strength alloy in aerospace, military, automotive, and other fields that require strength and fatigue resistance. It has excellent mechanical properties, but different heat treatment conditions can provide different mechanical characteristics. 7075-T651 and 7075-T6510 are two common heat-treated states of 7075 aluminum, with significant differences, especially in terms of strength, ductility, and fatigue performance.
Comparison Table of Differences and Applications between 7075-T651 and 7075-T6510 Aluminum Alloys
| Characteristics | 7075-T651 | 7075-T6510 |
| Heat treatment process | Solution heat treatment, stress relief, artificial aging | Solution heat treatment, stress relief, artificial aging |
| Stress relief stretching | Moderate stretching, allows certain ductility | Greater stretching, suitable for high strength requirements, but no straightening |
| Elongation at fracture | Relatively high, about 5.7% | Relatively low, about 5% |
| Fatigue strength | Slightly lower, suitable for low to medium load environments | Higher, suitable for high-cycle load environments |
| Tensile strength | Relatively high, suitable for applications with larger deformation | Higher, suitable for applications with larger forces |
| Yield strength | Relatively high, suitable for structures subjected to medium stress | Higher, suitable for high-strength structural applications with greater stress |
| Ductility | Good, suitable for applications requiring significant deformation | Poor, emphasizes strength and fatigue performance, not suitable for large deformation |
| Typical applications | Aerospace structural components, aircraft wings, frames, missiles, etc. | Aircraft engine components, aircraft fuselage, turbine blades, etc., requiring high strength and high fatigue resistance |
| Advantages | Better ductility, suitable for applications subjected to vibration or shock | Higher strength and fatigue life, suitable for environments with repeated loading |
| Disadvantages | Compared to 7075-T6510, lower fatigue strength and tensile strength | Poor ductility, prone to plastic deformation |
7075-T651 Aluminum vs. 7075-T6510 Aluminum Mechanical Properties
| Property | 7075-T651 Aluminum | 7075-T6510 Aluminum |
| Elastic (Young's) Modulus, GPa | 70 | 70 |
| Elongation at Break, % | 8.2 | 5.7 |
| Fatigue Strength, MPa | 160 | 180 |
| Poisson's Ratio | 0.32 | 0.32 |
| Shear Modulus, GPa | 26 | 26 |
| Shear Strength, MPa | 330 | 340 |
| Tensile Strength: Ultimate (UTS), MPa | 550 | 590 |
| Tensile Strength: Yield (Proof), MPa | 460 | 510 |
7075-T651 Aluminum vs. 7075-T6510 Aluminum Heat Treatment and Processing
This state of 7075 aluminum undergoes solution heat treatment, stress relief, and artificial aging. Stress relief is achieved by stretching the metal to a certain extent, releasing stress concentration under load. Through this treatment, 7075-T651 aluminum has high ductility in various applications.
Similar to 7075-T651, 7075-T6510 also undergoes solution heat treatment, stress relief, and artificial aging, but with one difference: the amount of stretching during the stress relief process is slightly increased, and this state does not undergo straightening. 7075-T6510 aluminum alloy is suitable for applications that require high strength, excellent fatigue performance, but have lower ductility requirements.
7075-T651 Aluminum vs. 7075-T6510 Aluminum Applications
- 7075-T651: More suitable for applications requiring high ductility, able to maintain high reliability even under large deformation. Suitable for environments subjected to impact or vibration.
- 7075-T6510: Provides higher strength and fatigue performance but sacrifices some ductility. Suitable for applications that require extremely high strength and can maintain performance under long-term cyclic loading.
7075 T651 Aluminum Applications
Due to its good ductility and high strength, 7075-T651 is commonly used in aerospace structural components such as aircraft wings, aircraft frames, missile, and rocket parts. In these applications, the material needs to undergo large deformation without fracture, making 7075-T651 an ideal choice.
7075 T6510 Aluminum Applications
7075-T6510, with its higher tensile strength and fatigue strength, is suitable for high-strength and high-fatigue applications, especially in environments with fluctuating loads, such as aircraft engine components, aircraft fuselages, turbine blades, etc. In these parts, strength and fatigue life are the most important performance requirements, and 7075-T6510 offers higher reliability.
