7178 aluminium alloy
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]
Chemical composition
[edit]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
[edit]| 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 |
Designations
[edit]Aluminium alloy 7178 alloy can be designated as:[1]
- ASTM B209
- ASTM B221
- ASTM B241
- ASTM B316
- QQ A-200/13
- QQ A-200/14
- QQ A-250/14
- QQ A-250/21
- QQ A-250/28
- QQ A-430
- SAE J454
Applications
[edit]- Aircraft components[1]
- Petroleum refineries[5]
- Boilers[5]
- Heat exchangers[5]
- Condensers[5]
- Pipelines[5]
- Cooling towers[5]
- Steam exhausts[5]
- Electric generation plants[5]
References
[edit]- ^ a b c d e f g h "7178 aluminum alloy". 31 August 2012.
- ^ "Annealing effect on 7178 aluminum alloys". Archived from the original on 2016-08-17.
- ^ "Resistance welding in 7178 alloy". Archived from the original on 2006-03-13.
- ^ a b "7178 aluminum alloy properties". Archived from the original on 2004-05-21.
- ^ a b c d e f g h "Aluminum 7178 applications". Archived from the original on 2021-01-08.