2011

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Grade 2011 aluminium is an age hardenable alloy noted for its free-machining characteristics and good mechanical properties. The 2011 alloy has a small addition of copper and lead that improve the strength and machinability respectively.

The free machining properties of the 2011 alloy allows the use of either carbide or high-speed tool steel tooling and makes it an ideal choice for use on intricate designs or for complex and detailed parts. It can also sometimes be machined using the same tooling as for free machining brass without the need for alteration. The material can also be cold formed by bending (but this is usually carried out prior to age hardening and the development of higher properties).

The drawback of the added strength and machinability is that the 2011 has a poor corrosion resistance. This means parts made from 2011 tend to be anodised to provide an additional surface protection (If higher levels of corrosion resistance are required, 6262 could be a suitable replacement). Further to this, welding is not recommended but as it is used mainly for machined parts there is rarely a need to weld this alloy.

Chemical Composition

Aluminium

Rem

Silicon

0.4 max

Copper

5.0 - 6.0

Iron

0.7 max

Bismuth

0.2 - 0.6

Zinc

0.3 max

Lead

0.2 - 0.6

Others

0.15 max

Related Specifications

2011

A92011

BS4300

BS FC1

DIN WS 3.1655

CB60

AlCu6BiPb

A-U5PbBi

AlCuBiPb

Key Features

  • Excellent Machining Properties
  • Good Anodising Capability
  • Reasonable Strength Levels after heat treatment.

Typical Physical Properties

Melting Range

540-640°C

Density                                               

2.83 g/cm³

Thermal conductivity                    

163 W/m°K

Thermal expansion coefficient                 

23 x 10-6

Electrical Conductivity         

39.2 IACS

Electrical resistivity                               

0.044 microhm m

Modulus of elasticity                              

71 GPa

 Fabrication Properties

Cold Formability                                   

Fair

Machinability  

Excellent

Soldering

Fair

Brazing

Poor

Oxy-acetylene welding                 

Poor

Gas-shielded arc welding

Poor

Resistance welding

Poor

Typical Applications

Often used for mass produced parts manufactured by repetition machining such as fasteners, appliance parts & trim, Automotive components and trim, screw machine products, atomizer and hose parts, pipe stems, and tube fittings.

This technical information is given by Holme Dodsworth Metals without charge and the user shall employ such information at their own discretion and risk. For more detailed technical advice on temper selection, fabrication, joining, machining, physical and mechanical data please contact us as space does not permit the listing of every feature of the material.

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Holme Dodsworth Metals Limited.
59/69 Heaton Park Road.
Newcastle Upon Tyne NE6 1SQ
Registered in England. Company No. 00842702