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Thermal Expansion

  • Thermal Expansion
  • 2018/05/15
  • 200

When the temperature of aluminium is increased, the metal expands and this is called thermal expansion. One example of thermal extension is that if, for example, the temperature of a piece of aluminium alloy 6063 is -20°C and its length is 2700 mm long, and it is heated to a temperature of 30 °C, it will subsequently be 2703 mm long due to thermal expansion. As a result of the adjustment of the temperature of the metal, thermal expansion of 3 mm is observed. The size adjustment of the metal is therefore important to consider, especially in environments with large temperature fluctuations.

thermal-expansion.png


If you would like to calculate the thermal expansion for your aluminium, use the following thermal expansion coefficient (λ): µm m-1 K-1.

Here you can see how we have calculated the earlier example of thermal expansion via the above coefficient:
* Thermal expansion coefficient λ = (µm)/(m∙K)
* Value for alloy 6063: 23.5 µm/(m * K)
* If the material is 2700 mm long at -20°C, the same material will be 23.5 µm/(m * K) * 2700 mm * 50 K (from-20°C to + 30°C) = 3172.5 µm = 3 mm at +30°C.

 

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