Aluminium Alloys - Aluminium 2011 Properties, Fabrication and Applications

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. 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 (a). Mechanical properties for aluminium alloy 2011 T4

BS EN 755-2:2008
Rod and Bar
Up to 200mm Dia. or 60mm A/F
Property Value
Proof Stress 125 Min MPa
Tensile Strength 275 Min MPa
Elongation A50 mm 12 min %
Hardness Brinell 95 HB
Elongation A 14 min %

*Properties above are for material in the T4 condition


Table 2 (b). Mechanical properties for aluminium alloy 2011 T6

BS EN 755-2:2008
Rod and Bar
Up to 75mm Dia.
Property Value
Proof Stress 230 Min MPa
Tensile Strength 310 Min MPa
Elongation A50 mm 6 min %
Hardness Brinell 110 HB
Elongation A 8 min %

*Properties above are for material in the T6 condition


Physical Properties of Aluminium Alloy 2011

Table 3. 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. 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 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 supplied as either round or hexagonal bar

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.

This information has been sourced, reviewed and adapted from materials provided by Aalco - Ferrous and Non-Ferrous Metals Stockist.

For more information on this source, please visit Aalco - Ferrous and Non-Ferrous Metals Stockist.

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Comments

  1. Kirk Roerig Kirk Roerig United States says:

    The density for 2011 on this page is wrong. It should be 2820 kg/m^3.

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoM.com.

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