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7005 aluminium alloy

7005 is an aluminium wrought alloy[1] used in bicycle frames. Due to its relative ease of welding, it does not require expensive heat treating. It is, however, harder to form, making manufacture more challenging.[2] It has an Ultimate Tensile Strength of 350 MPa, a Fatigue Strength of 150 MPa and a density of 2.78 g/cm3.[3] It does not need to be precipitation hardened, but can be cooled in air.[4]

Specific forms of AL 7005 include

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  1. 7005-O
  2. 7005-T5
  3. 7005-T53
  4. 7005-T6[5]

Chemical composition

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The alloy composition of 7005 is:[6]

7005 Aluminum alloy
No Element Percentage
1 Aluminium 91.0% - 94.7%
2 Chromium 0.06% - 0.20%
3 Copper <=0.10 %
4 Iron <=0.40 %
5 Magnesium 1.0% - 1.80%
6 Manganese 0.20% - 0.70%
7 Silicon <=0.35%
8 Titanium 0.010% - 0.060%
9 Zinc 4.0% - 5.0%
10 Zirconium 0.080% - 0.20%
11 Other, total <= 0.15%

Properties

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No Property Value
1 Density 2.78 g/cm3
2 Elastic modulus[1] 70-80 GPa
3 Poisson Ratio[1] 0.33
4 Thermal conductivity[1] 166 W/mK
5 Ultimate Tensile Strength[1] 350 MPa
6 Fatigue Strength[1] 150 MPa

Further reading

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References

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  1. ^ a b c d e f "7005 aluminum alloy properties". 31 August 2012.
  2. ^ "Bicycle aluminum alloy". 14 August 2018.
  3. ^ "matweb Aluminium 7005".
  4. ^ Davis, Joseph R. (1993). Aluminum and Aluminum Alloys. ASM International. ISBN 9780871704962.
  5. ^ "Make it From". Make it From. Archived from the original on 2015-11-09.
  6. ^ "MatWeb - the Online Materials Information Resource". Archived from the original on 2014-04-27. Retrieved 2012-08-26.

Aluminum alloy table

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