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mechanical properties of 6061 aluminum alloy

Author : Alex  Updated : Nov 16, 2017 00:00
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Mechanical properties of 6061 aluminum alloy

The mechanical properties of 6061 aluminum alloy are characterized by high tensile strength, elongation rate, elastic coefficient and fatigue resistance. 

Mechanical properties of 6061 aluminum alloy:

The ultimate tensile strength of 6061 is 124 MPa

Tensile yield strength 55.2 MPa

Elongation rate

Elasticity coefficient 68.9 GPa

The bending limit is 228 MPa

Bearing Yield Strength 103 MPa

Poisson ratio 0.330

Fatigue strength 62.1 MPa

mechanical properties of 6061 aluminum alloy

Aluminum alloys can be treated with heat treatment for good mechanical properties, physical properties and corrosion resistance.It can be improved by heat treatment methods such as quenching and aging. It can be divided into hard aluminum, wrought aluminum, super hard aluminum and special aluminum alloy. 

Heat treatment technology of 6061 aluminum alloy:

  • 1) rapid annealing temperature of 350 ~ 410 ℃;With the difference of effective thickness of the material, the thermal insulation time is between 30 and 120 min.Air or water is cold.
  • 2) high temperature annealing, heating temperature of 350 ~ 500 ℃.When the finished product thickness is greater than 6mm, the thermal insulation time is 10 ~ 30min and
  • 3) low temperature annealing, heating temperature of 150 ~ 250 ℃;The thermal insulation time is 2 ~ 3h;Air or water is cold.  

Silicon has a corrosive effect on hard alloys.Although more than 12% of Si's aluminum alloy is known as high silicon aluminum alloy, it is recommended to use diamond cutting tools, but this is not absolute, and the increasing of silicon content gradually increases the destructive power of the cutter.Therefore, some manufacturers recommend diamond cutting tools when they have more than 8% silicon content.The 6061 aluminum alloy is a transition interval between 8% and 12%. It can be used as either normal hard alloy or diamond tool.But the use of hard alloy should use the method of PVD (physical coating) method, aluminum - free, film thickness of the knife.Because of PVD method and the small film thickness cutting tool to keep the sharp cutting edges, made possible by the (or grew up in order to avoid abnormal film layer on the edge need to enough passivation of blade, cutting aluminum alloy will not sharp), and membrane material containing aluminum may make the blade film layer with the workpiece materials close cooperation with the combination of film and cutting tool substrate.Because the current super hard coating is mostly aluminum, nitrogen and titanium compounds, it may cause the hard alloy matrix to flake off when the film layer is peeling.  

The structure of the mechanical properties of 6061 aluminum alloy makes it the ideal material, widely used in machinery manufacturing, transportation, machinery, machinery and aviation industry, the aircraft fuselage, skin, such as compressor with aluminum alloy manufacture, in order to reduce weight.

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