7178 aluminum alloy is wrought alloy. It has high zinc content. [1] After annealing, aluminum alloy 7178 has high machinability. [2] Resistance welding can be used. [3]
The chemical composition of Aluminium / Aluminum 7178 alloy is outlined in the following table. It is difficult to cold work. Forming is hard to use for this alloy. It has high machinability. [1]
Element [1] | Content (%) |
---|---|
Aluminium / Aluminum, Al | 88.1 |
Zinc, Zn | 6.8 |
Magnesium, Mg | 2.7 |
Copper, Cu | 2.0 |
Chromium, Cr | 0.26 |
Properties | Metric |
---|---|
Density [1] | 2.82 g/cm3 |
Melting point [1] | 482 °C |
Elastic modulus [1] | 70-80 GPa |
Poisson's ratio | 0.33 |
Thermal expansion | 23.4 (10-6/°C) |
Ultimate Tensile Strength [4] | 607 MPa |
Tensile Yield Strength [4] | 538 MPa |
Aluminium alloy 7178 alloy can be designated as: [1]