Posted August 27, 2019

Aluminum Comparison: 6061 vs. 7075

aluminum blocks ready for machiningLightweight, strong, durable, and widely available, aluminum is perfect for a range of industrial and commercial applications from aircraft to iPhones. Aluminum comes in a variety of alloys, with 6061 and 7075 being the most common for mechanical applications. Let's take a closer look at what each has to offer.



  • Contains magnesium and silicon
  • Good all-around choice for heat-treatability, weldabilitiy, and forming
  • Excellent corrosion resistance, better than 7075
  • Used in food and drink packaging
  • Regularly used in small aircraft, boats
  • Extremely versatile
  • Great for secondary operations like anodizing.
  • Strong, but not quite as strong as 7075
  • Contains zinc and a small amount of magnesium
  • Strong, with a higher strength-to-weight ratio than 6061
  • Able to match steel in terms of strength
  • Decent corrosion resistance, but not as good as 6061
  • Heavier than 6061, though still highly machinable
  • Used in aircraft, industrial tooling, sporting equipment
  • Low density with good thermal properties
  • Produces a smooth material finish


So, which is best? That depends on your use case. But to sum it all up:

Aluminum 6061: Cost effective, medium strength, easy to work with.

Aluminum 7075: Exceptionally strong with typically smoother finishes.


One more thing! Here's a version you can print out for future reference: 

Download Chart


Topics: materials, Manufacturing