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.

Specific forms of AL 7005 include 7005-O 7005-T5 7005-T53 7005-T6

Chemical composition The alloy composition of 7005 is: +7005 Aluminum alloyNoElementPercentage1Aluminium91.0% - 94.7%2Chromium0.06% - 0.20%3Copper<=0.10 %4Iron <=0.40 %5Magnesium 1.0% - 1.80%6Manganese0.20% - 0.70%7Silicon <=0.35%8Titanium 0.010% - 0.060%9Zinc4.0% - 5.0%10Zirconium0.080% - 0.20%11Other, total<= 0.15%

Properties +NoPropertyValue1Density2.78 g/cm32Elastic modulus70-80 GPa3Poisson Ratio0.334Thermal conductivity166 W/mK5Ultimate Tensile Strength350 MPa6Fatigue Strength150 MPa

Further reading

Aluminum 7005-T6 Properties Aluminum 7005-O Properties Aluminum 7005-T53 Properties

References

Aluminum alloy table