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We are specialists in engineering materials support to improve the aerospace MRO supply chain.

Smiths MRO is a sub-divsion of a larger business - Smiths Advanced Metals.

Smiths MRO focuses on raw material support for the global aircraft maintenance, repair and overhaul market. Our business is supported by a broad and diverse stock range with a dedicated team that provides outstanding service levels required for our industry.

Our dedicated export team ship goods worldwide.

7075 Aluminium Sheet

Including QQA250 aluminium sheet

7075 aluminium sheet provides very high strength.

7075 aluminium offers good fatigue resistance and very high strength, good compressive strength and excellent mechanical properties.

The alloy finds use in producing aircraft skins, and particularly for parts or aircraft repairs where fatigue resistance is essential.


7075 represents a strong, machinable aluminium alloy with superior stress corrosion resistance. The alloy offers a favourable strength-to-weight ratio when compared to steel. 7075 aluminium should be considered for engineering applications where strength is a factor, but corrosion resistance is not a consideration. Although corrosion resistance of the alloy is not so good, resistance is superior to 2xxx series aluminium.

Our product represents one of the strongest commercial aluminium alloys currently available, as is the plasticity of the alloy. Low-temperature strength is another impressive feature. Specific performance characteristics of the alloy vary depending on the temper selected.


7075 aluminium sheets find use in the aerospace and MRO engineering sectors. Examples include structural aircraft parts, airframe production, upper skins and spar caps. 7075 is the material of choice for the latter two examples due to the alloys' high compressive strength. The alloy often finds use in aerospace applications in cladded form, including wing tension members.

Available Conditions and Specifications

7075 aluminium sheets are often certified to the QQA250 specifications but also new AMS specifications, which are superseding the QQA250 specifications as follows:

  • 7075 O Bare AMS4044
  • 7075 O Clad AMS4048
  • 7075 T6 Bare AMS4045
  • 7075 T6 Clad AMS4049
The broad range of 7075 aluminium sheets includes material as thin as 0.012” (0.3048mm) and as thick as 0.190” (4.826mm).

Product Features:

    7075 O Bare to AMS4044
    7075 O Clad AMS4048
    7075 T6 Bare AMS4045
    7075 T6 Clad AMS4049

    Wing tension members
    Upper skins and spar caps

    Very high strength
    High compressive stress
    Excellent mechanical properties
    Good fatigue strength

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