Aluminium Alloy 7075-T6

Aluminium Alloy 7075-T6

7075-T6 is a high strength alloy originally developed for aircraft and aerospace applications, often referred to as “aircraft grade”. The main alloy ingredients of zinc and copper make 7075 one of the highest strength aluminium alloys available.

7075 in the T6 temper is stronger than most mild steels. 7075 is considered to have good machinability, good corrosion resistance but is not good for welding.

Aluminium 7075-T651 has similar characteristics to T6 but goes through an extra process to relieve some of the stresses in the material.

Aluminium Alloy 7075 is available in T6 and T651 condition in plate and round bar.

Alloy Composition 7075

Al Zn5,5 Mg Cu
Al Zn Mg Cu1,5
T6 (F48-52)

Chemical Composition (EN 573-3)

SI Fe Cu Mn Mg Cr Ni Zn Ti Other Each Other Total
0.4 0.5 1.2-2.0 0.3 2.1-2.9 0.18-0.28 5.1-6.1 0.2 0.05 0.15
Composition in %, remainder aluminium
Material according to EN 573-3:2013

Physical Properties 7075-T6

Hardness, Brinell 150
Hardness, Rockwell A 53.5
Hardness, Rockwell B 87
Hardness, Vickers 175
Ultimate Tensile Strength 572 MPa 83,000 psi
Tensile Yield Strength 503 MPa 73,000 psi
Elongation at Break 11 %


7075 Features:

  • strength comparable to many steels
  • good fatigue strength
  • average machinability
  • can be highly polished


  • Marine, automotive and aviation
  • Hang glider airframes
  • Rock climbing equipment
  • Bicycle components

 [catlist name=aluminium]


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