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7178 aluminium alloy

{{Short description|Wrought aluminium zinc alloy}}

7178 aluminum alloy is wrought alloy. It has high zinc content.{{Cite web|last=|first=|date=31 August 2012|title=7178 aluminum alloy|url=https://www.azom.com/article.aspx?ArticleID=6645|archive-url=|archive-date=|access-date=|website=}} After annealing, aluminum alloy 7178 has high machinability.{{Cite web|last=|first=|date=|title=Annealing effect on 7178 aluminum alloys|url=https://continentalsteel.com/aluminum/grades/alloy-7178/|url-status=live|archive-url=https://web.archive.org/web/20160817161419/http://continentalsteel.com/aluminum/grades/alloy-7178/ |archive-date=2016-08-17 |access-date=|website=}} Resistance welding can be used.{{Cite web|last=|first=|date=|title=Resistance welding in 7178 alloy|url=https://www.suppliersonline.com/propertypages/7178.asp|url-status=live|archive-url=https://web.archive.org/web/20060313164543/http://www.suppliersonline.com/propertypages/7178.asp |archive-date=2006-03-13 |access-date=|website=}}

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.

class="wikitable"

!Element

!Content (%)

Aluminium / Aluminum, Al

|88.1

Zinc, Zn

|6.8

Magnesium, Mg

|2.7

Copper, Cu

|2.0

Chromium, Cr

|0.26

Properties

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!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{{Cite web|last=|first=|date=|title=7178 aluminum alloy properties|url=http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA7178T6|url-status=live|archive-url=https://web.archive.org/web/20040521104123/http://asm.matweb.com:80/search/SpecificMaterial.asp?bassnum=MA7178T6 |archive-date=2004-05-21 |access-date=|website=}}

|607 MPa

Tensile Yield Strength

|538 MPa

Designations

Aluminium alloy 7178 alloy can be designated as:

  1. ASTM B209
  2. ASTM B221
  3. ASTM B241
  4. ASTM B316
  5. QQ A-200/13
  6. QQ A-200/14
  7. QQ A-250/14
  8. QQ A-250/21
  9. QQ A-250/28
  10. QQ A-430
  11. SAE J454

Applications

  1. Aircraft components
  2. Petroleum refineries{{Cite web|last=|first=|date=|title=Aluminum 7178 applications|url=https://alloysintl.com/inventory/aluminum-alloys/aluminum-7178/|url-status=live|archive-url=https://web.archive.org/web/20210108231702/https://alloysintl.com/inventory/aluminum-alloys/aluminum-7178/ |archive-date=2021-01-08 |access-date=|website=}}
  3. Boilers
  4. Heat exchangers
  5. Condensers
  6. Pipelines
  7. Cooling towers
  8. Steam exhausts
  9. Electric generation plants

References

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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}}

Category:Aluminium–zinc alloys