7178 aluminium alloy

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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]

Element[1] 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[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

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

Advantages[]

  1. High corrosion resistance
  2. High tensile strength
  3. Excellent polish
  4. High machine strength
  5. High creep resistance
  6. High temperature strength
  7. High mechanical properties

[5]

Applications[]

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

References[]

  1. ^ a b c d e f g h "7178 aluminum alloy".{{cite web}}: CS1 maint: url-status (link)
  2. ^ "Annealing effect on 7178 aluminum alloys".{{cite web}}: CS1 maint: url-status (link)
  3. ^ "Resistance welding in 7178 alloy".{{cite web}}: CS1 maint: url-status (link)
  4. ^ a b "7178 aluminum alloy properties".{{cite web}}: CS1 maint: url-status (link)
  5. ^ "Advantage of 7178 alloy".{{cite web}}: CS1 maint: url-status (link)
  6. ^ a b c d e f g h "Aluminum 7178 applications".{{cite web}}: CS1 maint: url-status (link)

External links[]

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