Faits marquants
- 2011 aluminum offers excellente usinabilité, making it ideal for high-speed automatic lathe work.
- Son résistance à la traction is moderate, suited to less demanding precision parts.
- Résistance à la corrosion 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.
Introduction
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 résistance modérée à la corrosion, so anodising or coating is common in harsher service. For sourcing detail and 2026 updates, see our ultimate guide to 2011 aluminum.
Qu'est-ce que l'alliage d'aluminium 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.
Composition chimique de l'aluminium 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.
| Élément | Gamme de composition (% en poids) | Description |
|---|---|---|
| Aluminium (Al) | 91.3 - 94.3 | Le composant principal, qui fournit une base légère avec une résistance modérée à la corrosion. |
| Cuivre (Cu) | 5.0 - 6.0 | Augmente considérablement la résistance, idéal pour les pièces à haute résistance. |
| Plomb (Pb) | 0.2 - 0.6 | Enhances machinability, allowing smooth, high-speed processing. |
| Bismuth (Bi) | 0.2 - 0.6 | Améliore la formation de copeaux pendant l'usinage, ce qui accroît la précision. |
| Fer (Fe) | 0,7 (max) | Maintenu à un niveau bas pour préserver l'intégrité de l'alliage et réduire le risque de corrosion. |
| Silicium (Si) | 0,4 (max) | Limité pour garantir des propriétés d'usinage optimales. |
| Zinc (Zn) | 0,3 (max) | Minimale pour éviter tout impact sur la solidité et la résistance à la corrosion. |
| Autres (chacun) | 0,05 (max) | Traces d'éléments, contrôlées pour assurer la cohérence de l'alliage. |
| Autres (total) | 0,15 (max) | Total des éléments mineurs, maintenus à un niveau bas pour préserver les performances. |
This composition maximizes machinability while keeping weight low. Where higher corrosion resistance is needed, alloys such as 6262 T9 are considered superior alternatives.
Propriétés physiques et caractéristiques principales
The physical properties of 2011 aluminum make it useful for high-speed, excellente usinabilité applications that also need modest résistance à la traction. 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.
Applications courantes
Because of its strengths in fabrication et high-speed machining, 2011 aluminum fits many precision industries. Common applications include:
- Pièces détachées pour appareils ménagers and trims with clean aesthetic finishes.
- Garnitures automobiles where lightweight machined parts are needed.
- Fixations et raccords for functional and decorative use.
- Pièces de rechange 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 Aluminium vs. autres alliages
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.
- Haute résistance: tensile strength around 350–400 MPa in T3 temper.
- Excellente usinabilité: 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.
| Propriété | Value / Description |
|---|---|
| Densité | 2,82 g/cm³ |
| Point de fusion | ~540-640°C |
| Résistance à la traction (état T3) | ~350-400 MPa |
| Limite d'élasticité (état T3) | ~300-350 MPa |
| Résistance à la corrosion | Poor; requires coatings in harsh environments |
| Conductivité thermique | ~150-170 W/m-K |
| Conductivité électrique | ~38-43% IACS |
| Soudabilité | Poor; not recommended for welding |
| Formabilité | Moderate; suited to machining, not complex shapes |
| Taux de dilatation thermique | 22.9 × 10-⁶ /°C |
Aluminium 2011 vs 2024 vs 6061
Comparing 2011, 2024, and 6061 shows how each fits different jobs.
| Alliage | Caractéristiques principales | La force | Résistance à la corrosion | Soudabilité | Applications typiques |
|---|---|---|---|---|---|
| 2011 | Excellente usinabilité, traitement thermique, résistance modérée | Modéré (T3 : ~370 MPa) | Pauvre | Pauvre | Produits de décolletage, raccords, pièces de précision |
| 2024 | Haute résistance, bonne usinabilité, traitement thermique | Élevée (T3 : ~480 MPa) | Pauvre | Pauvre | Peaux d'avion, pièces structurelles aérospatiales |
| 6061 | Polyvalent, traitable thermiquement, résistance et formabilité équilibrées | Modéré (T6 : ~310 MPa) | Très bon | Excellent | Éléments de structure, accessoires marins, usage général |
In summary:
- Aluminium 2011: top machinability for precision screw-machine parts.
- 2024 aluminium: high strength for aerospace structural components.
- Aluminium 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.
Comparaison des températures T3, T6 et T8 en 2011
Temper choice changes the résistance à la traction and behavior of 2011 at des vitesses élevées.
| Tempérer | Caractéristiques principales | La force | Résistance à la corrosion | Formabilité | Applications typiques |
|---|---|---|---|---|---|
| 2011 T3 | Traitement thermique de mise en solution, écrouissage, vieillissement naturel, haute usinabilité | Modéré (~370 MPa) | Pauvre | Bon | Produits de décolletage, raccords, pièces de précision |
| 2011 T6 | Traitement thermique de mise en solution, vieillissement artificiel, résistance plus élevée | Élevé (~400 MPa) | Pauvre | Modéré | Composants de précision à haute résistance, fixations |
| 2011 T8 | Traitement thermique en solution, déformation à froid, vieillissement artificiel, résistance maximale | Le plus élevé (~420 MPa) | Pauvre | Plus bas | Pièces usinées à haute résistance, raccords aérospatiaux |
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.
Conseils pour l'approvisionnement en aluminium 2011
- Check alloy specifications: Confirm the Aluminium 2011 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 Les tempéraments T3 et 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 produits de vissage automatique, fixations et pièces complexes 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.
Conclusion
2011 aluminum is a specialist free-machining grade. It machines faster and cleaner than most alternatives, but its mauvaise résistance à la corrosion et 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.
Questions fréquemment posées
Qu'est-ce qui différencie l'aluminium 2011 des autres alliages d'aluminium ?
2011 stands out for its excellente usinabilité and efficiency at des vitesses élevées. Unlike many alloys, it uses lead and bismuth to aid intricate-part production. It offers only moderate résistance à la corrosion and needs anodising for surface protection.
L'aluminium 2011 peut-il être soudé ou traité thermiquement ?
Welding is not recommended because of extremely poor weldability. It does support travail à froid et peut être traité thermiquement in tempers such as T6 to raise résistance à la traction, which suits complex machined components.
L'aluminium 2011 est-il adapté aux composants soumis à de fortes contraintes ?
While 2011 excels at excellente usinabilité and high-speed work, its résistance à la traction is lower than many industrial alternatives. It is better suited to precision parts than to fabrication under extreme or long-term stress.
L'aluminium 2011 est-il adapté aux environnements corrosifs ?
Because of its résistance modérée à la corrosion, 2011 is limited in corrosive environments and components usually need anodising. Its excellente usinabilité et travail à froid make it ideal for short-term or indoor applications.
Comment l'aluminium 2011 se compare-t-il à l'aluminium 6061 en termes d'usinabilité ?
Offres 2011 excellente usinabilité, beating 6061 for intricate and repetitive high-speed work. 6061 gives better résistance à la corrosion and structural use, while 2011 remains the preference for precision, efficiency-focused tooling.
Quelle trempe d'aluminium 2011 est la meilleure pour l'usinage ?
Le Tempérament T6 of 2011 is a strong choice for machining, combining good résistance à la traction with efficient travail à froid. Its harder surface supports high-speed operation and detailed, repetitive tasks.
