Strength in numbers

Aluminium Alloy   |   BS-L

L105 T4 Tube


High strength tubing.

Heat treatable alloy. High mechanical strength slightly higher than 2011 and 2017A.

Chemical Composition

BS L105(1971)
Alloy L105
Chemical Element % Present
Aluminium (Al) balance
Tin (Sn) 0.05 max
Lead (Pb) 0.05 max
Chromium (Cr) 0.1 max
Zinc (Zn) 0.2 max
Titanium + Zirconium (Ti+Zr) 0.2 max
Nickel (Ni) 0.2 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

Material shall be supplied treated, drawn and aged at room temperature. Material shall be heat treated as follows: 1. Solution treat by heating at a temperature of 505+/- 5C and quenching in water at a temperature not exceeding 40C. 2. Age at room temperature for not less than 48 hours.

Alloy Designations

Aluminium alloy L105 - 2014A is covered by Standard BS EN 2100 and has similarities to the following standard designations and specifications:

2014 / 2014A             AMS 4121

Temper Types

The most common temper for L105 - 2014A aluminium tube is:

  • T4

Supplied Forms

L105-2014A aluminium is supplied as tube

  • Tube

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 134 - 135 W/m.K

Mechanical Properties

BS L105(1971)
Tube -
Mechanical Property Value
Proof Stress 290 Min MPa
Tensile Strength 400 Min MPa
Elongation A50 mm 10 Min %

Tube re-solutionised and naturally aged without cold drawing may be expected to have reduced machanical properties.