ALUMINIUM ALLOYS

6060 aluminium alloy

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Chemical composition

Nominal chemical composition

Al-0,5Mg-0,45Si

Chemical composition according to EN 573-3

Table 1 – The chemical composition of 6060 aluminium alloy  by EN 573-3
in comparison with 6063 aluminium alloy

Metallurgical characteristics

  • Wrought
  • Heat hardenable
  • Partial analogues: 6063 aluminium alloy.
  • 6060 aluminium alloys has an excessive content of Si relative to the magnesium.
  • Maximum iron content: 0,30 compared with 0,35 % in 6063 aluminium alloy.
  • The place of 6060 aluminium alloy among other 6xxx series alloys see at Figure 1.

Figure 1 – AlMgSi extrusion ingot alloys used in Europe and USA [5]

Designations

  • EN 573-3: 2013: EN AW-6060 и EN AW-Al MgSi
  • Teal Sheet – Aluminium Association: 6060
  • Unified Numbering System (UNS): А96060
  • ISO 209:2007: 6060
  • DIN 1725-1 (canceled): AlMgSi0.5 and 3.3206

Typical applications

  • Building constructions, such as windows, facade constructions, enter the store, winter gardens.
  • Internal partitions.
  • Heat dissipating elements of electronic devices, including, computers.
  • Elements of engineering equipment.
  • Interior equipment of passenger cars.
  • Irrigation, heating and cooling pipes.
  • Furniture and office equipment.

Mechanical properties

Table 2 – Requirements of EN 755-2 to mechanical properties
extruded rods, tubes and profiles of 6060 aluminium alloy

Poisson’s ratio

  • 0,33

Elastic modulus (Young’s modulus)

  • in tension and compression – 69000 MPa
  • Shear – 26000 MPa.

Physical properties

Density

  • 2,70 g / cm3 at 20 ° C

Melting interval

  • From 600 to 655 ° C.

Coefficient of linear thermal expansion

  • 23,5 micrometers/(m K)
  • In the range from 20 to 100 ° C.

Thermal conductivity

  • 200 W / (m K)

Specific heat

  • 880-900 J / (kg K)

Electrical conductivity

  • 52 % IACS (54 % in relation to annealed copper)

Technological properties

Extrudability

  • See Figure 2

Figure 2

Weldability

  • Good arc-welded under inert gas, in particular, argon arc welding, as non-consumable electrode (GTAW-TIG), and consumable electrode (GMWA-MIG).
  • Conventional welding alloy – 4043.

Homogenization

  • 580-585 ° C
  • At least 2 hours.

Annealing

  • 420 ° C.

Solution treatment

  • 510 ° C.

Artificial ageing

  • 185 ° C
  • 5 hours.

Bending

  • T4 temper.

Sources:

1. European Aluminium Association –  http://www.alueurope.eu
2.  EN 573-3
3. EN 755-2
4. TALAT 1302
5. Tom Hauge, Hydro Aluminium, Norway – IHAA Symposium, 25th of September 2014, New York