Aluminium Alloy | Commercial Alloy
2011 T3 Rod and Bar
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 2011 can replace free machining brass without the need for alterations to tooling.
It has poor corrosion resistance, which means parts made from 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.
Applications - 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
Chemical Composition
|
BS EN 573-3:2009 Alloy 2011 |
|
|---|---|
| Chemical Element | % Present |
| Aluminium (Al) | balance |
| Other (Each) | 0.05 max |
| Others (Total) | 0.15 max |
| Zinc (Zn) | 0.3 max |
| Silicon (Si) | 0.4 max |
| Lead (Pb) | 0.2 - 0.4 |
| Bismuth (Bi) | 0.2 - 0.6 |
| Iron (Fe) | 0.7 max |
| Copper (Cu) | 5 - 6 |
Alloy Designations
Aluminium alloy 2011 also corresponds to the following standard designations and specifications but may not be a direct equivalent :
AlCu6BiPb
FC1
A92011
CB60
3.1655
AlCuBiPb:
Temper Types
The most common temper for 2011 aluminium bar - extruded and drawn - is:
- T3
Supplied Forms
- Bar
Generic Physical Properties
| Physical Property | Value |
|---|---|
| Density | 2.83 g/cm³ |
| Modulus of Elasticity | 70 GPa |
| Electrical Resistivity | 0.038 x10^-6 Ω .m |
| Thermal Conductivity | 151 W/m.K |
| Thermal Expansion | 22.9 x10^-6 /K |
| Melting Point | 535 °C |
Mechanical Properties
|
BS EN 755-2:2008 Extruded and Drawn Bar - Up to 200mm Dia. or 60mm A/F |
|
|---|---|
| Mechanical Property | Value |
| Proof Stress | 270 Min MPa |
| Tensile Strength | 320 Min MPa |
| Hardness Brinell | 90 Min HB |
| Elongation A | 10 Min % |
Properties above are for material in the T4 condition
Weldability
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
Process Rating
Workability - Cold Fair
Machinability Excellent
Weldability – Gas Poor
Weldability – Arc Poor
Weldability – Resistance Poor
Brazability Poor
Solderability Fair