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7178 aluminium alloy

Wrought aluminium zinc alloy From Wikipedia, the free encyclopedia

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.[1]

More information Element, Content (%) ...
Element[1] Content (%)
Aluminium / Aluminum, Al 88.1
Zinc, Zn 6.8
Magnesium, Mg 2.7
Copper, Cu 2.0
Chromium, Cr 0.26
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Properties

More information Properties, Metric ...
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
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Designations

Aluminium alloy 7178 alloy can be designated as:[1]

  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[1]
  2. Petroleum refineries[5]
  3. Boilers[5]
  4. Heat exchangers[5]
  5. Condensers[5]
  6. Pipelines[5]
  7. Cooling towers[5]
  8. Steam exhausts[5]
  9. Electric generation plants[5]

References

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