6061-T6 Aluminum Alloy: Properties, Heat Treatment & Equivalents vs 7075-T6 Aerospace Aluminum: High-Strength Zn-Mg-Cu Alloy
Side-by-side engineering comparison of 6061-T6 Aluminum Alloy: Properties, Heat Treatment & Equivalents (ASTM B209/B211) and 7075-T6 Aerospace Aluminum: High-Strength Zn-Mg-Cu Alloy (ASTM B209/B211). Compare mechanical properties, chemical composition, density, yield strength, international equivalents, and typical applications to select the right material for your project.
Quick Comparison
| Property | 6061-T6 Aluminum Alloy: P | 7075-T6 Aerospace Aluminu |
|---|---|---|
| Standard | ASTM B209/B211 | ASTM B209/B211 |
| Category | Aluminum Alloy | Aluminum Alloy |
| Density | 2.70 g/cm³ | 2.81 g/cm³ |
| Yield Strength | 276 MPa (40 ksi) | 503 MPa (73 ksi) |
| Tensile Strength | 310 MPa (45 ksi) | 572 MPa (83 ksi) |
| Key Applications | 6061-T6 is the most versatile heat-treatable aluminum alloy, widely used in structural, aerospace, automotive, and marin... | 7075-T6 is a high-strength aluminum-zinc alloy developed for aerospace, with 5.1-6.1% zinc as the primary alloying eleme... |
International Equivalents
| 6061-T6 Aluminum All Equivalents | 7075-T6 Aerospace Al Equivalents |
|---|---|
| EN AW-6061 | EN AW-7075 |
| AlSi1MgCu | AlZn5.5MgCu |
| A6061 | A7075 |
| AA6061-T6 | AA7075-T6 |
| ISO AlSi1MgCu | ISO AlZn5.5MgCu |
How to Choose
| Choose 6061-T6 Aluminum Alloy: P when... | 6061-T6 is the general-purpose structural aluminum—weldable, corrosion-resistant, 276 MPa yield. |
| Choose 7075-T6 Aerospace Aluminu when... | 7075-T6 is the aerospace grade—503 MPa yield, nearly double the strength, but poor weldability and corrosion resistance. |
Frequently Compared Questions
What is the main difference between 6061-T6 Aluminum Alloy: Proper and 7075-T6 Aerospace Aluminum: Hi?
6061-T6 Aluminum Alloy: Properties, Heat Treatment & Equivalents (ASTM B209/B211) provides 276 MPa (40 ksi) yield strength at 2.70 g/cm³ density, while 7075-T6 Aerospace Aluminum: High-Strength Zn-Mg-Cu Alloy (ASTM B209/B211) delivers 503 MPa (73 ksi) at 2.81 g/cm³. The choice depends on whether your application prioritizes weldability and corrosion resistance or maximum strength-to-weight ratio.
Can 6061-T6 Aluminum Alloy: Proper be substituted for 7075-T6 Aerospace Aluminum: Hi?
In many applications, these materials can be cross-referenced, but direct substitution should always be verified against specific project specifications, especially for weldability and corrosion resistance, maximum strength-to-weight ratio, and operating environment. Consult your engineer of record.