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Mifa extrusion aluminium

Aerospace aluminium alloys: 6061, 6082, and 7075

Choosing the right alloys, whether aluminium or magnesium, is crucial for achieving the best precision extrusion profiles. Numerous factors play a role in choosing the preferred materials. The key question is: For what aerospace applications are the components going to be used? Mifa supplies both to passenger aircraft as well as military aircraft.

Aluminium alloys in aircraft

Many aerospace customers ask for a specific alloy when placing an order. We then always respond with the following counter-question: Why do you want to make the product specifically with this aviation alloy? Another aerospace alloy might be a better choice to consider for the task at hand.

Choosing the right aerospace aluminium alloy depends on several factors, the most important of which is the purpose of the product (this also applies to other sectors). This key question then leads on to other further questions:

  • How strong does the final product need to be?
  • Is the component going to be visible or not? In other words: Is it important that the surface looks good?
  • How important is the elasticity?
  • Does it need to be (highly) corrosion resistant?
  • Is the conductivity of heat and/or electricity an important consideration?
  • In which temperature will the end product be used?

The answers to these questions from our aerospace customers are important to be able to choose the right alloys. Another factor also plays a role: the construction of the product. Complex products with, for example, small cores, thin wall thicknesses, and narrow tolerances are not possible to make with a hard and less malleable alloy. Fortunately, Mifa has a wide range of aluminium alloys used in the aerospace industry, with each one having attributes that suit a specific solution.

Aluminium alloys used in the aerospace industry: 6061, 6082, and 7075

There are hundreds of aluminium alloys. Mifa offers a standard range of fourteen aluminium alloys with which we produce more than 95% of our products. Our standard range of aviation alloys consists of alloys from the following series: 1xxx, 3xxx, 6xxx, and 7xxx.

The 6xxx series

These alloys contain silicon and magnesium. We work with the following alloys: 6060, 6063, 6005A, 6061, and 6082. We also work with the following specials: 6066 and 6463. In general, the more magnesium and the more silicon that are added to the aluminium, the stronger the end product will be. These alloys are frequently chosen as they have good weldability, high resistance to corrosion, machinability, anodizability, and electrical conductivity.

Of all the alloy types, the 6xxx series is most often used in the aerospace sector. Within this series, the 6061 and 6063 alloys are most commonly used in aerospace due to their high strength. These are aerospace alloys that are prescribed by the aviation authorities. These alloys are particularly used by Airbus and Boeing for aircraft interiors.

The 7xxx series

Our standard range includes 7020, 7022, and alloy 7075 from the 7xxx series. Next to aluminium, the 7020 also consists of magnesium and zinc. Copper is also added to the 7022 and 7075. These alloys can be hardened and are some of the strongest we have. However, once again, they have reduced malleability and are therefore not suitable for complex products that require high precision. 7075 is a very strong alloy that is commonly used in the aerospace industry for structural parts.

Jet engine

Aviation alloys overview

The table below compares the properties of the commonly used aerospace alloys hat we have in our standard range. Know that the relative production speed, price, and achievable tolerances of the different aviation alloys are compared with 6063. Keep in mind that these values are an indication. Ultimately, the profile’s form and dimensions decide which alloys are suitable and determine what the final price of the product will be.

AlloyApplicationsMin. Rm (Mpa)Min. Rp 0,2 (Mpa)Max. design freedomSpeedRelative priceRelative tolerancesSolid profileHollow profile
1050 CONDUCTIVITY 70 20 + 150 100 80 Y Y
3003 CONDUCTIVITY AUTOMOTIVE radiators 95 35 ++ 120 80 110 Y Y
6005A GEN. CONSTRUCTION 270 225 + 90 120 90 Y Y
6060 GEN. CONSTRUCTION 210 155 +++ 100 100 100 Y Y
6063 GEN. CONSTRUCTION 230 190 +++ 100 100 100 Y Y
6061 AEROSPACE/SPORT 260 240 + 90 120 90 Y Y
6082 STRENGTH /MARITIME 310 260 + 80 130 80 Y Y
7020 DYNAMIC STRESS DEFENSE & AEROSPACE 350 290 + 25 150 80 Y Y
7022 DYNAMIC STRESS  DEFENSE & AEROSPACE 490 420 - 25 200 80 Y N
7075 DYNAMIC STRESS DEFENSE & AEROSPACE 540 470 -- 20 300 60 Y N
AZ31 GEN. CONSTRUCTION / SPORT 250 180 + 10 300 80 Y Y
AZ61 GEN. CONSTRUCTION 310 228 - 6 400 60 Y N
E43 AEROSPACE SEAT COMPONENTS 352 241 + 4 500 70 Y Y

We are happy to help!

For more information or if you have any questions concerning our aluminium alloys or magnesium alloys used in the aerospace industry, feel free to contact us. The easiest way is to fill in the contact form, we will reach out to you as soon as possible.

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Multi-core profiles

Cores or holes. They can be necessary for the profile's function, or useful for reducing the weight. Mifa excels at extruding complex profiles with many small cores.

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