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Strength in numbers

Aluminium Alloy   |   BS-L

L168 T6511 Bar

AerospaceL168 T6511 Commercial2014A

Aluminium alloy L168 - 2014A is a very high mechanical strength alloy used for critical applications and is the most widely used aluminium bar alloy in the aerospace industry.
It has very good machinability and is thus used for the production of complex machined parts.


Chemical Composition

BS L168(1978)
Alloy L168
Chemical Element % Present
Aluminium (Al) balance
Other (Each) 0.05 max
Chromium (Cr) 0.1 max
Nickel (Ni) 0.1 max
Titanium (Ti) 0.15 max
Others (Total) 0.15 max
Titanium + Zirconium (Ti+Zr) 0.2 max
Zinc (Zn) 0.25 max
Iron (Fe) 0.5 max
Magnesium (Mg) 0.2 - 0.8
Silicon (Si) 0.5 - 0.9
Manganese (Mn) 0.4 - 1.2
Copper (Cu) 3.9 - 5

Alloy Designations

Aluminium alloy BS L168 - 2014A has similarities to the following standard designations and specifications but may not be a direct equivalent:

2014, AMS4121


Temper Types

The most common tempers for L168 - 2014A aluminium are:

  • T6
  • T6510
  • T6511

Supplied Forms

L168-2014A aluminium is supplied in Bar, Rod and Extruded Sections.

  • Bar
  • Extrusions

Generic Physical Properties

Physical Property Value
Density 2.80 g/cm³
Melting Point 640 °C
Thermal Expansion 22.8 x10^-6 /K
Modulus of Elasticity 73 GPa
Thermal Conductivity 155 W/m.K
Electrical Resistivity 40 % IACS

Mechanical Properties

These Mechanical Properties are for bar in the T6511 temper

Diameter Proof Strength (Min) Tensile Strenth (Min) Elongation % (Min)
Up to & incl 2.5 370 415 6
Over 2.5 up to and incl. 10 385 435 6
Over 10 up to and incl. 25 415 460 7
Over 25 up to and incl. 75 440 490 7
Over 75 up to and incl. 100 435 480 7
Over 100 up to and incl. 150 420 465 7
Over 150 up to and incl. 200 390 435 7