2A11 aluminum alloy (GB/T 3190) is a high-strength Al-Cu-Mg wrought aluminum alloy, commonly referred to as “hard aluminum.” Known for its excellent tensile strength, good fatigue resistance, and superior cold workability in the T4 temper, 2A11 is the preferred material for aircraft rivets, precision fasteners, and high-stress structural components. Linsy supplies 2A11 aluminum sheet, plate, coil, bar, and tube in tempers O, T4, and T6, with custom sizes, processing support, and MTC reports available.
Formulaires disponibles : sheet / plate / coil / bar / tube / custom profile
Tempéraments courants : O / T4 / T6
Assistance technique : CNC machining / laser cutting / anodizing / polishing / cutting
Documents relatifs à la qualité : Rapport MTC fourni avec chaque commande ; rapports d'essais SGS disponibles sur demande
2A11 aluminum alloy is a Chinese GB/T 3190 designation for a high-strength Al-Cu-Mg wrought aluminum alloy, commonly referred to as “hard aluminum” (硬铝) in Chinese industrial contexts. It is the GB equivalent of the internationally recognized AA 2017 alloy (AlCu4SiMg), though the two are covered under different national standards and may have slightly different certification scopes.
2A11 is primarily alloyed with copper (3.8–4.5%), magnesium (0.4–0.8%), and manganese (0.4–0.8%), with silicon kept below 0.5%. The copper content provides high tensile strength through precipitation hardening, while magnesium and manganese contribute to additional strength and workability. In the T4 temper (solution heat-treated and naturally aged), 2A11 typically achieves tensile strength exceeding 370 MPa, making it one of the strongest aluminum alloys in the 2000 series for general engineering applications.
A key characteristic of 2A11 is its excellent cold workability in the T4 condition, which makes it the preferred material for aircraft rivets and cold-formed fasteners. It also offers good machinability, especially in the T6 temper. However, like other Al-Cu alloys, 2A11 has relatively poor corrosion resistance compared to 5xxx and 6xxx series alloys, and is not recommended for welding by conventional arc methods due to susceptibility to hot cracking.
2A11 is covered under GB/T 3190 (China), and is commonly supplied in accordance with internal enterprise specifications aligned with GB standards. For procurement reference, buyers often compare 2A11 with AA 2017 (UNS A92017, EN AW-2017 / AlCu4MgSi).
Linsy supplies 2A11 aluminum alloy in a range of standard and custom product forms. Length, width, diameter, and dimensional tolerances can be tailored to your project requirements. If your specification is not listed below, please contact our sales team for a custom quotation.
| Formulaire | Tempérer | Épaisseur (mm) | Largeur (mm) | Longueur (mm) |
|---|---|---|---|---|
| 2A11 Sheet / Coil | O, T4, T6 | 0.3 – 6.0 | 500 – 2600 | 500 – 16000 |
| Formulaire | Tempérer | Épaisseur (mm) | Largeur (mm) | Longueur (mm) |
|---|---|---|---|---|
| 2A11 Plate | O, T4, T6 | 6.0 – 80 | 500 – 2600 | 500 – 16000 |
| Formulaire | Tempérer | Diamètre (mm) | Longueur (mm) |
|---|---|---|---|
| 2A11 Round Bar | O, T4, T6 | 6 – 300 | 500 – 6000 |
| 2A11 Square / Flat Bar | O, T4, T6 | 6 – 200 | 500 – 6000 |
| Formulaire | Tempérer | Diamètre extérieur (mm) | Épaisseur de la paroi (mm) | Longueur (mm) |
|---|---|---|---|---|
| 2A11 Round Tube | O, T4, T6 | 10 – 300 | 1 – 20 | 500 – 6000 |
Note: Length, width, diameter, and wall thickness can be customized. Please provide your drawing or specification for a tailored quotation.
| Standard | Désignation |
|---|---|
| China (GB/T 3190) | 2A11 |
| AA (UNS) | 2017 (A92017) — approximate equivalent |
| European (EN 573-3) | EN AW-2017 / AlCu4MgSi — approximate equivalent |
Note: 2A11 is a Chinese GB designation. AA 2017 (AlCu4MgSi) is the closest international equivalent, but mechanical property certification and dimensional tolerances are issued under GB standards for 2A11 supply.
| Élément | Contenu (%) |
|---|---|
| Silicium (Si) | ≤ 0.50 |
| Fer (Fe) | ≤ 0.40 |
| Cuivre (Cu) | 3.8 – 4.5 |
| Manganèse (Mn) | 0.4 - 0.8 |
| Magnésium (Mg) | 0.4 - 0.8 |
| Zinc (Zn) | ≤ 0.30 |
| Other Elements (Each) | ≤ 0.05 |
| Other Elements (Total) | ≤ 0.15 |
| Aluminium (Al) | Équilibre |
| Tempérer | Résistance à la traction (MPa) | Limite d'élasticité (MPa) | Élongation (%) | Utilisation typique |
|---|---|---|---|---|
| O | ≤ 245 | ≤ 125 | ≥ 12 | Forming, bending |
| T4 | ≥ 370 | ≥ 215 | ≥ 10 | Rivets, fasteners, cold-formed parts |
| T6 | ≥ 390 | ≥ 245 | ≥ 8 | High-stress structural components |
Values are typical for GB/T 3190 2A11 products. Actual values may vary by product form and thickness. MTC reports are provided with every order.
| Tempérer | Caractéristiques principales | Meilleur pour |
|---|---|---|
| O (recuit) | Softest condition, highest formability, lowest strength | Cold forming, bending, parts requiring complex shaping before heat treatment |
| T4 | Solution heat-treated and naturally aged; excellent strength with good cold workability | Aircraft rivets, cold-formed fasteners, precision mechanical parts |
| T6 | Solution heat-treated and artificially aged; highest strength | High-stress structural components, gears, bushings, heavy-duty fasteners |
2A11 achieves tensile strength exceeding 370 MPa in the T4 temper and over 390 MPa in T6, making it suitable for structural applications where weight savings are critical.
The alloy performs well under cyclic loading, which is essential for aerospace fasteners and dynamic-load components.
In the T6 temper, 2A11 machines cleanly with good surface finish, making it suitable for automatic screw machine products and precision parts.
Unlike many high-strength aluminum alloys, 2A11 in T4 condition can be cold-formed and bent without intermediate annealing, which is the reason it is the preferred material for aircraft rivets.
2A11 has relatively poor corrosion resistance due to its high copper content. For outdoor or corrosive environments, consider Alclad 2A11 (not always available) or apply protective surface treatments such as anodizing or painting. For mating with dissimilar metals, use appropriate insulation to prevent galvanic corrosion.
| Industry / Sector | Applications typiques | Why 2A11 Is Used |
|---|---|---|
| Aérospatiale | Aircraft rivets, structural fasteners, brackets | High strength-to-weight ratio, good fatigue resistance, excellent cold workability in T4 |
| Automobile | High-stress bolts, fasteners, precision machined parts | High strength, good machinability in T6 |
| Ingénierie de précision | Gears, bushings, camera components, optical instrument parts | Dimensional stability, good machinability, attractive machined finish |
| General Engineering | Automatic screw machine products, bushings, wear plates | Consistent mechanical properties, readily available in bar form |
Linsy provides the following quality documents and inspection support for 2A11 aluminum alloy orders:
Linsy Aluminum is a Shenzhen-based aluminum factory with more than 20 years of industry experience. We specialize in supplying a full range of aluminum alloys across the 1000–8000 series, including Chinese GB specifications such as 2A11 that are often harder to source through standard international suppliers.
Our advantages for 2A11 aluminum alloy sourcing include:
Learn more about 2000 series aluminum alloys and selection guidance:
Avantages pour Linsy
Linsy Aluminum est un fournisseur de premier plan de produits de transformation de l'aluminium, au service de diverses industries, notamment l'aérospatiale, l'ingénierie générale, l'automobile, la marine, la construction navale et d'autres applications industrielles spécialisées.
Nous nous engageons à respecter les normes les plus strictes en matière de qualité et de responsabilité environnementale, comme en témoignent nos certifications : ISO 9001:2008， ISO 14001:2004 et SGS.
