Liga de alumínio 2A11

What Is 2A11 Aluminum Alloy?

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).

Available 2A11 Aluminum Products

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.

2A11 Aluminum Sheet & Coil

Formulário	Temperamento	Espessura (mm)	Largura (mm)	Comprimento (mm)
2A11 Sheet / Coil	O, T4, T6	0.3 – 6.0	500 – 2600	500 – 16000

2A11 Aluminum Plate

Formulário	Temperamento	Espessura (mm)	Largura (mm)	Comprimento (mm)
2A11 Plate	O, T4, T6	6.0 – 80	500 – 2600	500 – 16000

2A11 Aluminum Bar

Formulário	Temperamento	Diâmetro (mm)	Comprimento (mm)
2A11 Round Bar	O, T4, T6	6 – 300	500 – 6000
2A11 Square / Flat Bar	O, T4, T6	6 – 200	500 – 6000

2A11 Aluminum Tube

Formulário	Temperamento	Diâmetro externo (mm)	Espessura da parede (mm)	Comprimento (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.

2A11 Aluminum Specifications & Equivalent Designations

Padrão	Designação
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.

Chemical Composition of 2A11 Aluminum (GB/T 3190)

Elemento	Conteúdo (%)
Silício (Si)	≤ 0.50
Ferro (Fe)	≤ 0.40
Cobre (Cu)	3.8 – 4.5
Manganês (Mn)	0.4 - 0.8
Magnésio (Mg)	0.4 - 0.8
Zinco (Zn)	≤ 0.30
Other Elements (Each)	≤ 0,05
Other Elements (Total)	≤ 0.15
Alumínio (Al)	Equilíbrio

Propriedades Mecânicas por Têmpera

Temperamento	Resistência à tração (MPa)	Resistência ao escoamento (MPa)	Alongamento (%)	Uso típico
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.

Temper Selection Guide

Temperamento	Principais características	Melhor para
O (recozido)	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

Key Characteristics of 2A11 Aluminum Alloy

Alta resistência

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.

Boa resistência à fadiga

The alloy performs well under cyclic loading, which is essential for aerospace fasteners and dynamic-load components.

Excelente usinabilidade

In the T6 temper, 2A11 machines cleanly with good surface finish, making it suitable for automatic screw machine products and precision parts.

Good Cold Workability (T4 Condition)

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.

Corrosion Resistance & Protection

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.

Common Applications of 2A11 Aluminum Alloy

Industry / Sector	Aplicações típicas	Why 2A11 Is Used
Aeroespacial	Aircraft rivets, structural fasteners, brackets	High strength-to-weight ratio, good fatigue resistance, excellent cold workability in T4
Automotivo	High-stress bolts, fasteners, precision machined parts	High strength, good machinability in T6
Engenharia de Precisão	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

**Notas sobre Processamento e Acabamento de Superfície**

• **Usinagem:** 2A11 has excellent machinability in T6 and T4 tempers. It produces small, manageable chips and accepts high cutting speeds. Use sharp carbide tooling for best results.
• Forming: In the O temper, 2A11 can be cold-formed. In T4 condition, limited cold working is possible without intermediate annealing. T6 parts are generally not cold-formed due to high strength.
• Soldagem: 2A11 is not recommended for welding by conventional arc welding (TIG/MIG) due to susceptibility to hot cracking in the heat-affected zone and significant strength loss. For joined assemblies, mechanical fastening (rivets, bolts) is preferred. Friction stir welding may be feasible for specialized applications — please consult our technical team.
• Heat Treatment: 2A11 is a heat-treatable alloy. T4 is achieved by solution heat treatment followed by natural aging. T6 uses artificial aging. Proper heat treatment is critical to achieving specified mechanical properties.
• Surface Finishing: Anodizing (including hard anodizing with appropriate pretreatments), polishing, and painting are all supported. Note that the copper-rich composition may result in a darker or less uniform anodized appearance compared to 6xxx series alloys.

Documentos de Qualidade e Inspeção

Linsy provides the following quality documents and inspection support for 2A11 aluminum alloy orders:

• **MTC (Certificado de Teste de Fábrica):** Issued for every order, reporting actual chemical composition and mechanical properties of the supplied batch.
• Dimensional inspection report: Available on request for precision-tolerance orders.
• **Relatórios de teste SGS:** Available on request with additional testing cost. Common reports include chemical composition verification, mechanical properties testing, ultrasonic testing (for thick plates), and RoHS + REACH compliance.
• Traceability: All materials are fully traceable to the original cast batch.

Why Choose Linsy for 2A11 Aluminum Alloy

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:

• GB specification expertise: We regularly supply GB/T 3190 alloys (2A11, 2A12, 2A14, etc.) to buyers who require Chinese standard materials for domestic or export projects.
• **Tamanhos de pedido flexíveis:** In addition to standard in-stock sizes, we support low-MOQ custom production for non-stock items, with typical lead time of 10–60 days depending on alloy, dimensions, and processing requirements.
• In-house processing: Our facility supports CNC machining, laser cutting, TIG and MIG welding (for appropriate alloys), anodizing, polishing, and protective film application — allowing you to source finished or semi-finished components, not just raw material.
• Certified quality system: Linsy operates under ISO 9001, ISO 14001, and ISO 45001 certified management systems. MTC reports are provided with every order.
• Global shipping experience: We regularly ship aluminum products to the United States, Europe, Japan, South Korea, and other international markets, with proper export packaging and documentation.

**Recursos Relacionados**

Learn more about 2000 series aluminum alloys and selection guidance:

• Tudo o que você precisa saber sobre a liga de alumínio de 2014

2A11 Aluminum Alloy FAQ

What is 2A11 aluminum alloy used for?

2A11 is primarily used for aircraft rivets, structural fasteners, precision machined parts, gears, bushings, and automatic screw machine products. Its combination of high strength and good cold workability in T4 makes it the preferred choice for cold-formed rivets.

Is 2A11 the same as AA 2017?

2A11 (GB/T 3190, China) and AA 2017 (UNS A92017, USA) have very similar chemical composition and mechanical properties, but they are covered under different national standards. When sourcing, confirm which standard your project requires. Linsy can supply 2A11 with GB-standard MTC, and can advise on equivalency for your application.

What tempers does Linsy supply for 2A11 aluminum?

We commonly supply 2A11 in O, T4, and T6 tempers. T4 is the most popular for rivets and cold-formed fasteners. T6 is used for high-stress structural parts requiring maximum strength. O temper is available for forming operations prior to heat treatment.

Can 2A11 aluminum be welded?

Conventional arc welding (TIG/MIG) is not recommended for 2A11 due to hot cracking susceptibility and strength loss in the heat-affected zone. Most 2A11 assemblies are joined by mechanical fastening (rivets, bolts). If welding is required for your application, please consult our technical team to evaluate feasibility.

Does Linsy provide MTC for 2A11 aluminum orders?

Yes, a Mill Test Certificate (MTC) report is provided with every order, documenting the actual chemical composition and mechanical properties of the supplied material. SGS test reports are also available on request with additional testing cost.

What is the typical lead time for 2A11 aluminum products?

For in-stock standard sizes, delivery can be arranged within 10–60 days depending on order volume and destination. For custom sizes or non-stock tempers, typical production lead time is also within the 10–60 day range. Please contact our sales team for a specific delivery estimate based on your requirement.

Can 2A11 aluminum be anodized?

Yes, 2A11 can be anodized. However, due to its copper content, the anodized layer may appear darker or less uniform compared to 6xxx series alloys. For decorative applications where appearance is critical, please request sample panels before bulk ordering.

What product forms does Linsy supply for 2A11 aluminum?

We supply 2A11 aluminum in sheet, plate, coil, round bar, flat bar, square bar, and tube. Custom profiles and wire can also be produced on request. Please provide your specification or drawing for a tailored quotation.

Is 2A11 suitable for marine applications?

2A11 has relatively poor corrosion resistance due to its high copper content and is not generally recommended for unsupervised marine environments. If your application involves moisture or salt exposure, please consult our technical team — we may recommend 5xxx or 6xxx series alloys, or propose protective measures for 2A11 parts.

FAQ Geral de Pedidos

What is the minimum order quantity (MOQ) for 2A11 aluminum?

We support low-MOQ orders for custom sizes. For standard in-stock specifications, MOQ is typically one piece or one coil. Please contact our sales team for details based on your specific requirement.

Does Linsy ship internationally?

Yes, we regularly ship aluminum products to the United States, Europe, Japan, South Korea, and other international markets. Export-standard packaging and full documentation are provided.

Can I request a sample before placing a bulk order?

Yes, sample pieces can be arranged. Please contact our sales team to discuss sample size, temper, and shipping arrangements.