7178 aluminium alloy


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.
ElementContent
Aluminium / Aluminum, Al88.1
Zinc, Zn6.8
Magnesium, Mg2.7
Copper, Cu2.0
Chromium, Cr0.26

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
  3. Boilers
  4. Heat exchangers
  5. Condensers
  6. Pipelines
  7. Cooling towers
  8. Steam exhausts
  9. Electric generation plants