The world's strongest cast aluminium alloy


A20X™ is a revolutionary new aluminium alloy developed and patented by Aeromet for casting and additive manufacturing.

The unique solidification mechanism of the patented, MMPDS approved A20X™ (A205) aluminium alloy transforms the design possibilities for aerospace components.

Unlocking the potential of aluminium casting

A20X™ aluminium castings open new opportunities for flight-critical components reducing complexity, machining and assembly. A20X™ castings are a viable aluminium solution for higher temperature environments.

By converting a component to an A20X™ casting, significant weight and cost reductions can be achieved.

For more information about A20X™ additive manufacturing and the licensee network, please visit

Yield Strength

A356 - 130MPa
D357 - 260MPa
A205 - 420MPa

Ultimate Tensile Strength

A356 - 205MPa
D357 - 350MPa
A205 - 470MPa
  • Strength

  • Fatigue

  • Temperature

High strength

A20X™ is the strongest aluminium casting alloy with typical mechanical properties of A20X™ cast parts up to 475MPa UTS, 415MPa yield and 3% elongation.


The A20X™ casting alloy offers fatigue properties equivalent to 7050 series wrought aluminium – far superior to any other aluminium casting alloy.


The A20X™ casting alloy can produce parts that can operate at temperatures at least 50 degrees higher than the limits of conventional aluminium casting alloys.

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Registered address: Aeromet Building, Cosgrove Close, Worcester, England, WR3 8UA / Company number: 01626585

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