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Strength in numbers

Aluminium Alloy   |   BS-L

L159 T6 Sheet

Commercial2014A

Aluminium alloy L159 – 2014A is a high strength sheet and strip specification.
The standard specifying this grade has been superseded by BSEN 2395


Chemical Composition

BS L159(1978)
Alloy L159
Chemical Element % Present
Aluminium (Al) balance
Other (Each) 0.05 max
Chromium (Cr) 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 L159 has similarities to the following standard designations and specifications but may not be a direct equivalent:

 2014A


Temper Types

The most common temper for L159 aluminium is:

  • T6

Supplied Forms

L159 aluminium is supplied as Clad Sheet and Strip.

  • Sheet
  • Strip

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

Thickness (mm) Proof Strength (Min) Tensile Strength (Min) Elongation % (Min)
Over 0.4 up to & incl. 0.8 370 430 6
Over 0.8 up to & incl.1.6 380 440 7
Over 1.6 up to & incl. 6.0 390 440 7