2011 Aluminium Alloy

2011 Aluminium Alloy

2011 aluminium alloy is a heat treatable high strength alloy that machines exceptionally well due to its high copper content. Often called a Free Machining Alloy or ‘FMA’, 2011 is used to produce complex and detailed parts such as screws, bolts, fittings, nuts, automatic lathe and screw machine products, fasteners and fittings.

2011 aluminium alloy has poor corrosion resistance; therefore, parts made from 2011 tend to be anodized to provide additional surface protection. When higher levels of corrosion resistance are required, 6262 T9 may be a suitable replacement.

The most common tempers for 2011 aluminium are T3 (solution heat treated, cold worked and naturally aged) and T6 (solution heat treated and artificially aged).

Aluminium Alloy 2011 is supplied in Bar (Hexagon, Round, Square) and Wire.

Typical Physical Properties of 2011 Aluminium Alloy Value
Density 2.82 kg/m3
Melting Point 535�C
Modulus of Elasticity 71 GPa
Electrical Resistivity 0.045x10-6 O.m
Thermal Conductivity 138 W/m.K
Thermal Expansion 23x10-6 /K
Typical Mechanical Properties of 2011 Aluminium Alloy Rod & Bar Up to 200mm Dia., 2011 T4 Rod & Bar Up to 75mm Dia., 2011 T6
Proof Stress 125 Min MPa 230 Min MPa
Tensile Strength 275 Min MPa 310 Min MPa
Elongation A50 mm 12 min % 6 min %
Hardness Brinell 95 HB 110 HB
Elongation A 14 min % 8 min %
Chemical Composition of 2011 Aluminium Alloy % Present
Si 0.40%
Fe 0.70%
Cu 5.0-6.0%
Pb 0.2-0.6%
Bi 0.2-0.6%
Zn 0.30%
Other 0.15%
Al Balance
Fabrication Response of 2011 Aluminium Alloy Rating
Workability - Cold Fair
Machinability Excellent
Weldability � Gas Poor
Weldability � Arc Poor
Weldability � Resistance Poor
Brazability Poor
Solderability Fair
Alloy Designation US US Federal European UK Other
2011 QQ-A-225/3 2011 Bar, cold drawn WS 3.1655 BS FC1 2011 Bar & Rod AlCu(Bi/Mg)Pb