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The best aluminium alloy for your product

Mifa precision profiles are available in various metal alloys. After all, the best possible end product starts with the right choice of material.Mifa specializes in precision magnesium and aluminium extrusion profiles.

That means that we have the expertise and experience needed to select the right alloy for each product. For example, we supply our profiles to companies in the industrial, aerospace and suspension sectors, where special aluminium alloysare often selected for their high material strength and wear resistance. The formability of an alloy is often another guiding factor in the final choice of material.

Advice on the right choice of material

Our engineers are always pleased to advise you on the best solution for your product. We combine our expertise in extrusion and metal compositions with the market and our customers’ product expertise to create the best possible product. That's how we've been successfully co-engineering with our customers for many years.

Take the aluminium door frame of the cockpit in an Airbus A350, for example. It is made of alloy 7020, which makes it not only very strong, but also forms a nicely finished surface. For the Max-Planck Institute, we make a product that is used at CERN. The product is made of a 6060 alloy and has a wall thickness of 0.4 mm and a dimensional tolerance of just ±0.02 mm!

Aluminium extrusion profiles

Mifa supplies precision profiles in the most complex shapes and in various aluminium alloys. Our precision and freedom of form mean that designers can disregard virtually all restrictions and standard standards. Extrusion not only gives you freedom of form, but is also a very economical production technology. The costs of an extrusion mould are relatively low. If required, Mifa can provide support in the design process and in choosing the right aluminium alloys.

Help with choosing aluminium alloys

For the best end result, the selection of good aluminium or magnesium alloy of great importance.With more than 530 registered aluminium alloys, the choice can often be overwhelming. We at Mifa offer a large proportion of these alloys and know what the best choice is.

That means that we have the expertise and experience needed to select the right composite for each product. Mifa extrudes the following aluminium and magnesium alloys as standard. Other alloys are available on request.

 

Aluminium alloys

Alloy number  Specification 
6xxx family Aluminium-magnesium-silicon profiles. This family is the most versatile alloy of today. All variants lend themselves well to heat treatment, forming, welding, and also feature outstanding resistance to corrosion. They are also fairly strong.
EN AW 6060
(Al MgSi)
One of the most popular aluminium composites where strength is not a key issue. The 6060 is easily formable, has a very good surface, is suitable for most surface treatments, and can even be welded. The 6060 alloy can in fact be used for anything, but is commonly used when the product is used in view. Examples include interior components in aircraft, industrial applications, etc.

  • Strength: average
  • Formability: good
  • Corrosion resistance: good
  • Weldability: good
  • Surface condition: good
EN AW 6063
(Al Mg0.7Si)
Almost identical to the 6060 alloy described above, but with its higher magnesium content the 6063 has better mechanical properties.
  • Strength: average 
  • Formability: good
  • Corrosion resistance: good
  • Weldability: good
  • Surface condition: good
EN AW 6005A
(Al SiMg(A))
Compared to the aluminium alloys set out above, the 6005A offers excellent mechanical properties, but performs less well regarding the surface condition.
  • Strength: average
  • Formability: good
  • Corrosion resistance: good
  • Weldability: good
  • Surface condition: fair-good
EN AW 6061
(Al Mg1SiCu)

The 6061 is an alloy commonly used in the United States. It has very good mechanical properties, but lacks the same surface properties and is more difficult to extrude than the other 6xxx variants. Slightly stronger than many other 6xxx variants (strength is between 6005 and 6082).

  • Strength: average
  • Formability: good
  • Corrosion resistance: good
  • Weldability: good
  • Surface condition: moderate
EN AW 6082
(Al SiMgMn)
Very good mechanical properties and stronger than other variants of the 6xxx series. Harder to extrude, which means it cannot be used for complex profiles.
  • Strength: average-good
  • Formability: good
  • Corrosion resistance: good
  • Weldability: good
  • Surface condition: poor
EN AW 6463 Similar to the 6063, but offers the possibility of a very nice surface with reflecting properties. Also highly extrudable.
  • Strength:
  • Formability: 
  • Corrosion resistance: good
  • Weldability:
  • Surface condition:
   
7xxxx family This family is mainly used in the aviation industry and features zinc as the primary alloying agent. The 7xxx is also supplemented with smaller amounts of magnesium and copper, making it easy to extrude and very strong.
EN AW 7020
(Al Zn4,5Mg1)
Its strength makes it widely used in the aerospace industry. The 7020 stands out for its strength after welding, which returns to 80%. The aluminium restores itself, as it were. No other aluminium alloy has this quality. This makes it a particularly reliable choice for welded parts that need to retain their strength. Examples include structural parts and building constructions, but certainly also structural aerospace components. Mifa previously developed a part for a zeppelin with this alloy. After about three months of 'recovery', the part has recovered the desired 80% strength.
  • Strength: high
  • Formability: fair-good
  • Corrosion resistance: fair
  • Weldability: good
  • Surface condition: moderate
EN AW 7022 Very strong aluminium composite, although the 7075 is even stronger. The material strength means that it is not possible to make hollow profiles with this alloy.
  • Strength: high
  • Formability: good
  • Corrosion resistance: poor-moderate
  • Weldability: moderate
  • Surface condition: moderate
EN AW 7075
(Al Zn5,5MgCu)
Its strength makes it widely used in the aerospace industry. Excellent mechanical properties and good resistance to metal fatigue. This is one of the most widely used aluminium alloys for heavy load-bearing structures. The material strength means that it is not possible to make hollow profiles with this alloy.
  • Strength: very high
  • Formability: good
  • Corrosion resistance: fair
  • Weldability: good
  • Surface condition: moderate
   
1xxx family The purist commercially available aluminium alloy with a purity of + 99%. This makes it highly resistant to corrosion, but it is best known for its electrical conductivity.
EN AW 1070 The only variant that Mifa carries as standard from this series is the 1070. Because of its electrical conductivity, it is almost invariably chosen for many electronic applications.
  • Strength: low
  • Formability: good/excellent
  • Corrosion resistance: good
  • Weldability: fair
  • Surface condition: good
   
2xxx family An aluminium-copper alloy is characterized by its strength and good resistance to metal fatigue. However, it is poorly to moderately resistant to corrosion, which is why it is usually coated with a pure alloy or requires a different type of surface treatment.
EN AW 2024
(Al Cu4SiMg1)
The only variant from the 2xxx family that Mifa carries as standard is the 2024. However, this alloy is becoming less popular because the 6xxx and 7xxx family generally has better properties than the older 2xxx alloys. The 2024 offers a good strength-to-weight ratio and is highly resistant to metal fatigue. One of the most commonly used aluminium composites in aviation, although the 6xxx and 7xxx variants are being used more and more often. Not very resistant to corrosion as standard, and therefore usually coated with a corrosion resistant aluminium.
  • Strength: high
  • Formability: fair
  • Corrosion resistance: moderate
  • Weldability: poor
  • Surface condition: poor
   
3xxx family With the addition of manganese as the main alloying component, this alloy becomes a lot stronger than the 1xxx series but remains highly formable.
EN AW 3003
(Al Mn1Cu)
One of the purest commercially available aluminium alloys. The main alloy component is manganese, which makes the 3003 alloy about 20% stronger than the 1xxx series. This alloy is mainly used in the automotive industry for building coolers.
  • Strength: moderate
  • Formability: good
  • Corrosion resistance: good
  • Weldability: good
  • Surface condition: good

 

Magnesium alloys

Alloy number

Specification 
AZ 31 The extreme lightness of magnesium, combined with its high strength, makes it a very attractive aluminium alloy variant. Extruding magnesium remained problematic for a long time, but in the last two decades and more specifically the last few years there has been a striking development that makes magnesium a fully-fledged extrusion product. AZ31 contains a small proportion of aluminium, which gives it better mechanical properties and makes it more resistant to corrosion.
  • Strength: strong
  • Formability: good
  • Corrosion resistance: good (in combination with the right coating/surface treatment)
  • Weldability: good
  • Surface condition: fair
AZ 61 The AZ61 alloy has similar properties to the AZ31, but the addition of a higher aluminium content provides increased corrosion resistance and greater material strength. The material strength means that it is not possible to make hollow profiles with this alloy.
  • Strength: very strong
  • Formability: fair-good
  • Corrosion resistance: good (in combination with the right coating/surface treatment)
  • Weldability: good
  • Surface condition: fair

 

Surface treatment for each metal composite

An extruded aluminium profile is generally given a surface treatment, e.g. to improve the corrosion resistance or to improve or eliminate other product characteristics. The right treatment is often vital to the application. Mifa Surface Treatment is a specialist in surface treatments. With all the facilities under one roof, Mifa is extremely well equipped for the entire process: from the choice of alloy to prototyping, and from production to post-processing (CNC milling, surface treatment, etc.).

Would you like to know more?

If you are not sure which aluminium alloys are best for your product or profile or you would like to consult one of our engineers, entirely free of obligation, then please call us on +31 (0)77-389 88 88. Of course you can also fill in the contact form if you have any questions.

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