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]
The alloy composition of 7005 is: [6]
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% |
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 |