Punti salienti
- 2011 aluminum offers eccellente lavorabilità, making it ideal for high-speed automatic lathe work.
- Il suo resistenza alla trazione is moderate, suited to less demanding precision parts.
- Resistenza alla corrosione is poor, so protective coatings or anodising are usually required.
- Lead and bismuth additions improve chip breaking for repetitive machining.
- It is not weldable, which limits it to machined or bolted assemblies.
The sections below explain 2011 aluminum in detail, from composition to temper selection.
Introduzione
2011 aluminum alloy is a 2000-series free-machining grade built for high-speed precision machining. It produces fine, easily cleared chips and a good surface finish on automatic lathes, which is why it is often called a “Free Machining Alloy.” Like other 2000-series grades it offers only moderata resistenza alla corrosione, so anodising or coating is common in harsher service. For sourcing detail and 2026 updates, see our ultimate guide to 2011 aluminum.
Che cos'è la lega di alluminio 2011?
2011 aluminum is a copper-based, free-machining alloy designed for intricate and repetitive screw-machine work. Copper (5.0%–6.0%) is the main strengthening element, while lead and bismuth (0.2%–0.6% each) improve machinability rather than strength. It is a practical choice when the priority is chip control and cycle time, not corrosion performance. It is commonly stocked as bars, rods, and profiles in tempers such as T3 and T8.
Composizione chimica dell'alluminio 2011
2011 is a 2000-series free-machining alloy. Copper raises strength, while lead and bismuth aid machinability. The table below lists typical composition ranges by weight.
| Elemento | Gamma di composizione (% in peso) | Descrizione |
|---|---|---|
| Alluminio (Al) | 91.3 - 94.3 | Il componente primario, che fornisce una base leggera con una moderata resistenza alla corrosione. |
| Rame (Cu) | 5.0 - 6.0 | Aumenta notevolmente la resistenza, ideale per i pezzi ad alta resistenza. |
| Piombo (Pb) | 0.2 - 0.6 | Enhances machinability, allowing smooth, high-speed processing. |
| Bismuto (Bi) | 0.2 - 0.6 | Migliora la formazione di trucioli durante la lavorazione, aumentando la precisione. |
| Ferro (Fe) | 0,7 (max) | Mantenuto basso per mantenere l'integrità della lega e ridurre il rischio di corrosione. |
| Silicio (Si) | 0,4 (max) | Limitato per garantire proprietà di lavorazione ottimali. |
| Zinco (Zn) | 0,3 (max) | Minimo per non compromettere la forza e la resistenza alla corrosione. |
| Altri (ciascuno) | 0,05 (max) | Elementi in traccia, controllati per garantire la coerenza della lega. |
| Altri (totale) | 0,15 (max) | Totale elementi minori, mantenuti bassi per mantenere le prestazioni. |
This composition maximizes machinability while keeping weight low. Where higher corrosion resistance is needed, alloys such as 6262 T9 are considered superior alternatives.
Proprietà fisiche e caratteristiche principali
The physical properties of 2011 aluminum make it useful for high-speed, eccellente lavorabilità applications that also need modest resistenza alla trazione. It has a density of 2.83 g/cm³, which keeps parts lightweight yet durable.
Its modulus of elasticity (70 GPa) gives reliable stability under moderate stress, while its thermal expansion coefficient (22.9×10⁻⁶/K) suits temperature-varying environments. Typical tensile strength is 310 MPa minimum and proof stress 230 MPa minimum.
Corrosion resistance is moderate, so anodising is recommended for some environments. The Brinell hardness of 110 HB supports high-speed operations that generate fine, easy-to-remove chips.
Applicazioni comuni
Because of its strengths in fabbricazione e high-speed machining, 2011 aluminum fits many precision industries. Common applications include:
- Parti di elettrodomestici and trims with clean aesthetic finishes.
- Finiture per autoveicoli where lightweight machined parts are needed.
- Elementi di fissaggio e raccordi for functional and decorative use.
- Parti d'ordinanza that demand durability and repeatability.
These uses rely on the alloy’s machinability and ability to produce detailed components efficiently, though anodising is needed in corrosive environments.
2011 Alluminio vs. altre leghe
2011 is a high-strength material built for precision machining and consistent components.
Its main characteristics are:
- Lightweight density: about 2.82 g/cm³, light for its strength.
- Alta resistenza: tensile strength around 350–400 MPa in T3 temper.
- Eccellente lavorabilità: easy to cut and shape for precision parts.
- Poor corrosion resistance: needs coatings in harsh or wet environments.
- Limited weldability: not suitable for welding; use machined or bolted assemblies.
| Proprietà | Value / Description |
|---|---|
| Densità | 2,82 g/cm³ |
| Punto di fusione | ~540-640°C |
| Resistenza alla trazione (tempra T3) | ~350-400 MPa |
| Resistenza allo snervamento (tempra T3) | ~300-350 MPa |
| Resistenza alla corrosione | Poor; requires coatings in harsh environments |
| Conduttività termica | ~150-170 W/m-K |
| Conducibilità elettrica | ~38-43% IACS |
| Saldabilità | Poor; not recommended for welding |
| Formabilità | Moderate; suited to machining, not complex shapes |
| Tasso di espansione termica | 22.9 × 10-⁶ /°C |
2011 vs. 2024 vs. 6061 Alluminio
Comparing 2011, 2024, and 6061 shows how each fits different jobs.
| Lega | Caratteristiche principali | La forza | Resistenza alla corrosione | Saldabilità | Applicazioni tipiche |
|---|---|---|---|---|---|
| 2011 | Eccellente lavorabilità, trattabile termicamente, moderata resistenza | Moderato (T3: ~370 MPa) | Povero | Povero | Prodotti per macchine a vite, raccordi, parti di precisione |
| 2024 | Alta resistenza, buona lavorabilità, trattabile termicamente | Alto (T3: ~480 MPa) | Povero | Povero | Pelli di aeromobili, parti strutturali aerospaziali |
| 6061 | Versatile, trattabile termicamente, resistenza e formabilità bilanciate | Moderato (T6: ~310 MPa) | Molto buono | Eccellente | Componenti strutturali, accessori marini, uso generale |
In summary:
- 2011 alluminio: top machinability for precision screw-machine parts.
- 2024 alluminio: high strength for aerospace structural components.
- Alluminio 6061: versatile and corrosion resistant for general structures.
Choose 2011 for machinable parts, 2024 for strong aerospace uses, and 6061 for flexible, corrosion-resistant structures.
Confronto tra le temperature T3, T6 e T8 del 2011
Temper choice changes the resistenza alla trazione and behavior of 2011 at alte velocità.
| Temperamento | Caratteristiche principali | La forza | Resistenza alla corrosione | Formabilità | Applicazioni tipiche |
|---|---|---|---|---|---|
| 2011 T3 | Trattato termicamente in soluzione, lavorato a freddo, invecchiato naturalmente, alta lavorabilità | Moderato (~370 MPa) | Povero | Buono | Prodotti per macchine a vite, raccordi, parti di precisione |
| 2011 T6 | Trattato termicamente in soluzione, invecchiato artificialmente, maggiore resistenza | Alto (~400 MPa) | Povero | Moderato | Componenti di precisione ad alta resistenza, elementi di fissaggio |
| 2011 T8 | Trattato termicamente in soluzione, lavorato a freddo, invecchiato artificialmente, massima resistenza | Massima (~420 MPa) | Povero | Più basso | Pezzi lavorati ad alta resistenza, raccordi aerospaziali |
2011 T3 offers a balance for general machining with good surface finishes. 2011 T6 is heat-treated and artificially aged for enhanced strength under stress. 2011 T8 is the hardest option, supporting intricate parts at high speeds.
Selecting the right temper depends on the application. Under rigorous conditions, T6 or T8 outperform T3 where higher strength or finer detailing is required.
Suggerimenti per l'approvvigionamento di alluminio 2011
- Check alloy specifications: Confirm the 2011 alluminio meets precise machining standards. Linsy Aluminum supplies 2011 that conforms to ASTM B211, ensuring the right chemical composition for free machining.
- Confirm temper availability: Verify the supplier stocks the temper you need. Linsy Aluminum supplies 2011 in Temperamenti T3 e T8, known for excellent machinability and chip-breaking behavior.
- Match application needs: Work with suppliers experienced in high-volume machining. Linsy Aluminum specializes in 2011 for prodotti per macchine automatiche a vite, dispositivi di fissaggio e parti complesse that need superior chip control.
- Assess machinability: Look for consistent chip formation and reduced tool wear. Linsy Aluminum’s 2011 is engineered for outstanding machinability, shortening cycle times and raising efficiency.
- Ensure reliable supply: Choose a supplier with consistent quality and on-time delivery. Linsy Aluminum provides global distribution and dedicated technical support so production runs smoothly.
Conclusione
2011 aluminum is a specialist free-machining grade. It machines faster and cleaner than most alternatives, but its scarsa resistenza alla corrosione e limited weldability make it best for indoor precision screw-machine parts rather than structural or corrosive-service components.
Why choose Linsy for 2011 aluminum? Linsy Aluminum is a trusted, professional supplier of certified 2011 stock that conforms to ISO 9001, ASTM B211, QQ-A-225/3, and EN standards. With 20 years of experience and 300,000 tons of annual production capacity, Linsy supplies 2011 in T3 and T8 tempers with custom dimensions, low MOQs, and global delivery to 20+ countries plus responsive technical support.
Ready to source 2011 for your next machining run? Visit the 2011 aluminum alloy product page to review stock forms and tempers and request a quote.
Domande frequenti
Cosa rende l'alluminio 2011 diverso dalle altre leghe di alluminio?
2011 stands out for its eccellente lavorabilità and efficiency at alte velocità. Unlike many alloys, it uses lead and bismuth to aid intricate-part production. It offers only moderate resistenza alla corrosione and needs anodising for surface protection.
L'alluminio 2011 può essere saldato o trattato termicamente?
Welding is not recommended because of extremely poor weldability. It does support lavorazione a freddo e può essere trattato termicamente in tempers such as T6 to raise resistenza alla trazione, which suits complex machined components.
L'alluminio 2011 è adatto ai componenti sottoposti a forti sollecitazioni?
While 2011 excels at eccellente lavorabilità and high-speed work, its resistenza alla trazione is lower than many industrial alternatives. It is better suited to precision parts than to fabrication under extreme or long-term stress.
L'alluminio 2011 è adatto agli ambienti corrosivi?
Because of its moderata resistenza alla corrosione, 2011 is limited in corrosive environments and components usually need anodising. Its eccellente lavorabilità e lavorazione a freddo make it ideal for short-term or indoor applications.
Come si colloca il 2011 rispetto all'alluminio 6061 in termini di lavorabilità?
Offerte 2011 eccellente lavorabilità, beating 6061 for intricate and repetitive high-speed work. 6061 gives better resistenza alla corrosione and structural use, while 2011 remains the preference for precision, efficiency-focused tooling.
Quale tempra di alluminio 2011 è migliore per la lavorazione?
Il Tempra T6 of 2011 is a strong choice for machining, combining good resistenza alla trazione with efficient lavorazione a freddo. Its harder surface supports high-speed operation and detailed, repetitive tasks.
