Strength in numbers

Aluminium Alloy   |   BS-L

6L17 'O' Sheet


6L17 - 1200 is a commercially pure aluminium sheet that may be clad with alloy 7072 for better protection against stress corrosion cracking.

Chemical Composition

BS 6L17(1985)
Alloy 6L17
Chemical Element % Present
Titanium (Ti) 0.05 max
Other (Each) 0.05 max
Manganese (Mn) 0.05 max
Copper (Cu) 0.05 max
Zinc (Zn) 0.1 max
Others (Total) 0.15 max
Silicon + Iron (Si+Fe) 1 max
Aluminium (Al) 99 min

The material shall be supplied cold rolled and annealed (Condition O). No heat treatment is required.

Alloy Designations

Aluminium alloy 6L17 - 1200 is covered by Standard BS EN 6L17 (1985) 

Temper Types

The most common temper for 6L17 - 1200 aluminium are:

  • O

Supplied Forms

6L17 - 1200 aluminium is supplied as soft sheet and strip

  • Sheet
  • Strip

Generic Physical Properties

Physical Property Value
Density 2.59 g/cm³
Melting Point 657 °C
Thermal Expansion 23.4 x10^-6 /K
Modulus of Elasticity 69 GPa
Thermal Conductivity 225 W/m.K
Electrical Resistivity 58.5 % IACS

Mechanical Properties

BS 6L17(1985)
Sheet - 0.4mm to 0.8mm
Mechanical Property Value
Proof Stress 25 Min MPa
Tensile Strength 70 Min - 105 Max MPa
Elongation A50 mm 20 Min %

The specification covers sheet and stip of 99% aluminium. The elongation value shown in the mechanical properties table apply to material with nominal thickness 0.4mm up to and including 0.8mm. Different values for additional nominal thicknesses are shown in the specification.