6061 T6 alluminio vs 7075 alluminio
6061 T6 alluminio vs 7075
Leghe di alluminio 6061-T6 e 7075 sono ampiamente utilizzati nelle applicazioni ingegneristiche, ma hanno proprietà diverse e sono adatti a scopi diversi. Di seguito è riportato un confronto dettagliato di queste due leghe in termini di proprietà meccaniche, Proprietà fisiche, e usi tipici:
Confronto tra 6061-T6 e 7075 Alluminio
| Proprietà | 6061-T6 Alluminio | 7075 Alluminio |
|---|
| Composizione | 0.8-1.2% Mg, 0.4-0.8% E, 0.15-0.4% Cu, 0.04-0.35% Cr | 5.1-6.1% Zn, 2.1-2.9% Mg, 1.2-2.0% Cu, 0.18-0.28% Cr |
| Resistenza alla trazione | 310 MPa (45 ksi) | 572 MPa (83 ksi) |
| Forza di snervamento | 275 MPa (40 ksi) | 503 MPa (73 ksi) |
| Allungamento a rottura | 12% | 11% |
| Durezza (Brinell) | 95 HB | 150 HB |
| Modulo di elasticità | 68.9 PA (10,000 ksi) | 71.7 PA (10,400 ksi) |
| Densità | 2.70 g/cm³ | 2.81 g/cm³ |
| Forza della fatica | 96 MPa (14 ksi) | 159 MPa (23 ksi) |
| Conduttività termica | 167 W/m·K | 130 W/m·K |
| Resistenza alla corrosione | Eccellente | Fair to Poor (without protective coating) |
| Saldabilità | Eccellente | Poor |
| Lavorabilità | Bene | Fair to Good |
| Trattamento termico | Heat treatable to T6 condition | Heat treatable to T6 or T73 condition |
Key Differences in Properties
- Forza:
- 7075 Alluminio is much stronger, with a tensile strength of 572 MPa compared to 310 MPa for 6061-T6. Questo fa 7075 aluminum ideal for high-stress structural applications.
- Resistenza alla corrosione:
- 6061-T6 Alluminio ha un'eccellente resistenza alla corrosione, especially against atmospheric and marine conditions, Mentre 7075 Alluminio has fair to poor corrosion resistance and often requires a protective coating or anodizing for use in corrosive environments.
- Saldabilità:
- 6061-T6 Alluminio is highly weldable, making it suitable for structures requiring frequent welding. 7075 Alluminio is difficult to weld and can suffer from cracking and brittleness after welding.
- Lavorabilità:
- 6061-T6 Alluminio is known for its good machinability, which is better than that of 7075 Alluminio, although 7075 still offers acceptable machinability for most applications.
- Densità:
- 7075 Alluminio is slightly denser (2.81 g/cm³) than 6061-T6 Alluminio (2.70 g/cm³), which can affect weight-sensitive applications.
- Conduttività termica:
- 6061-T6 Alluminio has better thermal conductivity (167 W/m·K) compared to 7075 Alluminio (130 W/m·K), making it preferable for heat-exchange applications.
Comparison of Uses
| Application Area | 6061-T6 Alluminio | 7075 Alluminio |
|---|
| Aerospaziale | Aircraft fittings, serbatoi di carburante, and fuselage structures | High-stress structural parts like aircraft wings, fuselage frames, and landing gear |
| Settore automobilistico | Chassis, wheel spacers, and engine components | Racing components like suspension parts, gears, and shafts |
| Marine | Boat hulls, alberi, e raccordi marini | Not typically used due to poor corrosion resistance |
| General Construction | Structural components, tubazioni, e cornici | Not common; only when high strength is needed |
| Sports Equipment | Telai di biciclette, camping equipment, and scuba tanks | High-performance bicycle components, climbing equipment |
| Elettronica | Heat sinks and electrical fittings | Not typically used; 6061 is preferred for thermal applications |
| Beni di consumo | Ladders, mobilia, and household items | Premium products where high strength is desired, such as rugged outdoor gear |
Summary
- 6061-T6 Alluminio is more versatile, easier to work with, e ha un'eccellente resistenza alla corrosione, rendendolo adatto ad una vasta gamma di applicazioni, including marine, settore automobilistico, costruzione, ed elettronica.
- 7075 Alluminio offers superior strength, making it ideal for high-stress applications like aerospace and high-performance sports equipment, but it has poorer weldability and corrosion resistance, limiting its use in certain environments.
