7178 aluminum alloy is wrought alloy. It has high zinc content. After annealing, aluminum alloy 7178 has high machinability. Resistance welding can be used.
Chemical composition
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.
| Element | Content (%) |
|---|---|
| Aluminium / Aluminum, Al | 88.1 |
| Zinc, Zn | 6.8 |
| Magnesium, Mg | 2.7 |
| Copper, Cu | 2.0 |
| Chromium, Cr | 0.26 |
Properties
| Properties | Metric |
|---|---|
| Density | 2.82 g/cm3 |
| Melting point | 482 °C |
| Elastic modulus | 70-80 GPa |
| Poisson's ratio | 0.33 |
| Thermal expansion | 23.4 (10-6/°C) |
| Ultimate Tensile Strength | 607 MPa |
| Tensile Yield Strength | 538 MPa |
Designations
Aluminium alloy 7178 alloy can be designated as:
- 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
- Aircraft components
- Petroleum refineries
- Boilers
- Heat exchangers
- Condensers
- Pipelines
- Cooling towers
- Steam exhausts
- Electric generation plants
References
- ^ "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.
- ^ "7178 aluminum alloy properties". Archived from the original on 2004-05-21.
- ^ "Aluminum 7178 applications". Archived from the original on 2021-01-08.
External links
- https://www.makeitfrom.com/material-properties/7178-T6-Aluminum
- https://www.substech.com/dokuwiki/doku.php?id=wrought_aluminum-zinc-magnesium_alloy_7178
| Aluminium alloys | |
|---|---|
| Introduction | |
| Al 1000 series (pure) | |
| Al-Cu 2000 series | |
| Al-Mn 3000 series | |
| Al-Si 4000 series | |
| Al-Mg 5000 series | |
| Al-Mg-Si 6000 series | |
| Al-Zn 7000 series | |
| 8000 series (misc.) | |
| Named alloys |
|