Aluminium Alloys - Aluminium 2011 Properties, Fabrication and Applications, Supplier Data by Aalco

Topics Covered

Background
Chemical Composition of Aluminium Alloy 2011
Properties of Aluminium Alloy 2011
Mechanical Properties of Aluminium Alloy 2011
Physical Properties of Aluminium Alloy 2011
Alloy Designations
Fabrication of Aluminium Alloy 2011
     Welding
     Fabrication Response
Temper
Applications of Aluminium Alloy 2011
Supplied Forms

Background

Aluminium alloy 2011 is a high mechanical strength alloy that machines exceptionally well. Often called a Free Machining Alloy or ‘FMA’ it is well suited to use in automatic lathes.

Machining at high speeds produces fine chips that are easily removed. The excellent machining characteristics allow the production of complex and detailed parts. In some circumstances Aluminium alloy 2011 can replace free machining brass without the need for alterations to tooling.

It has poor corrosion resistance, which means parts made from Aluminium alloy 2011 tend to be anodised to provide additional surface protection.

When higher levels of corrosion resistance are required, 6262 T9 may be a suitable replacement.

Chemical Composition of Aluminium Alloy 2011

Table 1. Typical chemical composition for aluminium alloy 2011

Element
% Present
Si
0.4%
Fe
0.7%
Cu
5.0-6.0%
Pb
0.2-0.6%
Bi
0.2-0.6%
Zn
0.3%
Other
0.15%
Al
Balance

Properties of Aluminium Alloy 2011

Mechanical Properties of Aluminium Alloy 2011

Table 2. Typical mechanical properties for aluminium alloy 2011

Temper

T3

T6

Proof Stress 0.2% (MPa)

290-300

300

Tensile Strength (MPa)

365

395

Shear Strength (MPa)

220

235

Elongation A5 (%)

15

12

Hardness Vickers (HV)

110

115

Physical Properties of Aluminium Alloy 2011

Table 3. Typical physical properties for aluminium alloy 2011

Property

Value

Density

2.82 kg/m3

Melting Point

535°C

Modulus of Elasticity

71 GPa

Electrical Resistivity

0.045x10-6 Ω.m

Thermal Conductivity

138 W/m.K

Thermal Expansion

23x10-6 /K

Alloy Designations

Aluminium alloy 2011 also corresponds to the following standard designations and specifications:

  • AlCu6BiPb
  • FC1
  • A92011
  • CB60
  • 3.1655
  • AlCuBiPb

Fabrication of Aluminium Alloy 2011

Welding

Aluminium alloy 2011 has extremely poor weldability and thus welding is not recommended. However, as it is used for machined parts there is rarely a need to weld this alloy.

Fabrication Response

Table 4. Typical fabrication response for aluminium alloy 2011

Process

Rating

Workability - Cold

Fair

Machinability

Excellent

Weldability – Gas

Poor

Weldability – Arc

Poor

Weldability – Resistance

Poor

Brazability

Poor

Solderability

Fair

Temper

The most common tempers for 2011 aluminium are:

  • T3 – Solution heat treated, cold worked and naturally aged
  • T6 – Solution heat treated and artificially aged

Applications of Aluminium Alloy 2011

Aluminium alloy 2011 is typically used in applications that require parts manufactured by repetition machining.

These applications may include:

  • Appliance parts & trim
  • Automotive trim
  • Fasteners and fittings
  • Ordnance

Supplied Forms

Aluminium alloy 2011 is typically supplied as either round or hexagonal bar

Source: Aalco

For more information on this source please visit Aalco

DISCLAIMER

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with temper, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company is respect of any action taken by any third party in reliance thereon.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose.

Any advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the company’s Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.

Date Added: Apr 19, 2005 | Updated: Jul 16, 2013
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