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In thicknesses of 6.35 mm (0.250 in) or less, it has elongation of 8% or more; in thicker sections, it has elongation of 10%. T651 temper has similar mechanical properties. The typical value for thermal conductivity for 6061-T6 at 25 °C (77 °F) is around 152 W/m K.
In heat transfer, the thermal conductivity of a substance, k, is an intensive property that indicates its ability to conduct heat. For most materials, the amount of heat conducted varies (usually non-linearly) with temperature. [1] Thermal conductivity is often measured with laser flash analysis. Alternative measurements are also established.
6063 is the most common alloy used for aluminium extrusion. It allows complex shapes to be formed with very smooth surfaces fit for anodizing and is popular for visible architectural applications such as window frames, door frames, roofs, and sign frames. [3] Applications requiring higher strength typically use 6061 or 6082 instead.
In addition, there is the phase before the for the Aluminium-copper alloys are typical. Alloys with higher copper content (alloyings 6061, 6056, 6013) are mainly used in aviation. Iron occurs in all aluminium alloys as an impurity in quantities of 0.05-0.5%.
The temper designation follows the cast or wrought designation number with a dash, a letter, and potentially a one to three digit number, e.g. 6061-T6. The definitions for the tempers are: [5] [6]-F : As fabricated-H : Strain hardened (cold worked) with or without thermal treatment -H1 : Strain hardened without thermal treatment
Aluminium alloy 1050 has one of the higher thermal conductivity values at 229 W/(m·K) and heat capacity of 922 J/(kg·K), [7] but is mechanically soft. Aluminium alloys 6060 (low-stress), 6061 , and 6063 are commonly used, with thermal conductivity values of 166 and 201 W/(m·K) respectively.
The thermal contact conductance coefficient, , is a property indicating the thermal conductivity, or ability to conduct heat, between two bodies in contact. The inverse of this property is termed thermal contact resistance .
Aluminium is an excellent thermal and electrical conductor, having around 60% the conductivity of copper, both thermal and electrical, while having only 30% of copper's density. [35] Aluminium is capable of superconductivity, with a superconducting critical temperature of 1.2 kelvin and a critical magnetic field of about 100 gauss (10 ...