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7005 aluminium alloy

Wrought aluminium zinc alloy

7005 aluminium alloy

Wrought aluminium zinc alloy

7005 is an aluminium wrought alloy 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. It has an Ultimate Tensile Strength of 350 MPa, a Fatigue Strength of 150 MPa and a density of 2.78 g/cm3. It does not need to be precipitation hardened, but can be cooled in air.

Bicycle frame made out of aluminium alloy

Specific forms of AL 7005 include

  1. 7005-O
  2. 7005-T5
  3. 7005-T53
  4. 7005-T6

Chemical composition

The alloy composition of 7005 is:

NoElementPercentage
**1**Aluminium91.0% - 94.7%
**2**Chromium0.06% - 0.20%
**3**Copper
**4**Iron
**5**Magnesium1.0% - 1.80%
**6**Manganese0.20% - 0.70%
**7**Silicon
**8**Titanium0.010% - 0.060%
**9**Zinc4.0% - 5.0%
**10**Zirconium0.080% - 0.20%
**11**Other, total

Properties

NoPropertyValue
**1**Density2.78 g/cm3
**2**Elastic modulus70-80 GPa
**3**Poisson Ratio0.33
**4**Thermal conductivity166 W/mK
**5**Ultimate Tensile Strength350 MPa
**6**Fatigue Strength150 MPa

References

Aluminum alloy table

References

  1. (31 August 2012). "7005 aluminum alloy properties".
  2. (14 August 2018). "Bicycle aluminum alloy".
  3. "matweb Aluminium 7005".
  4. Davis, Joseph R.. (1993). "Aluminum and Aluminum Alloys". ASM International.
  5. "Make it From".
  6. "MatWeb - the Online Materials Information Resource".
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