7005 aluminium 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.

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: