7178 aluminium alloy explained
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
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[4] | 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[5]
- Boilers
- Heat exchangers
- Condensers
- Pipelines
- Cooling towers
- Steam exhausts
- Electric generation plants
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
Notes and References
- Web site: 31 August 2012. 7178 aluminum alloy.
- Web site: Annealing effect on 7178 aluminum alloys. live. https://web.archive.org/web/20160817161419/http://continentalsteel.com/aluminum/grades/alloy-7178/ . 2016-08-17 .
- Web site: Resistance welding in 7178 alloy. live. https://web.archive.org/web/20060313164543/http://www.suppliersonline.com/propertypages/7178.asp . 2006-03-13 .
- Web site: 7178 aluminum alloy properties. live. https://web.archive.org/web/20040521104123/http://asm.matweb.com:80/search/SpecificMaterial.asp?bassnum=MA7178T6 . 2004-05-21 .
- Web site: Aluminum 7178 applications. live. https://web.archive.org/web/20210108231702/https://alloysintl.com/inventory/aluminum-alloys/aluminum-7178/ . 2021-01-08 .
