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AMS QQA 250/4 Aluminium AlloyAMS QQA 250/4

Aluminium Bare Sheet & Plate

AMS QQA 250/4 is supplied in bare sheet and plate form.

Due to the alloys good fatigue resistance, especially in thick plate form, the material is specified for use in the aerospace and military sector in fuselage applications in such areas as structures and wing tension members. With improved fracture toughness and fatigue crack growth, AMS QQA 250/4 continues to maintain strength characteristics. The alloy is available in a variety of tempers and cladding should be considered if corrosion resistance is required.

Key Features:

AMS QQA 250/4 offers high yield strength with good fatigue resistance and excellent toughness. The alloy is resistant to corrosive attack if cladded, and offers very good resistance to stress corrosion cracking in the T851 temper.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Download AMS QQA 250/4 Aluminium Alloy Datasheet

Typical Applications:

  • Aerospace Components
  • Fuselage applications
  • Aircraft structures
  • Wing skins
  • Scientific instruments
  • Truck wheels

We offer AMS QQA 250/4 in sheet and plate.


With more than thirty power saws within the Smiths group including a fully automated magazine feed CNC rod blanking line, we can process your material to your precise requirements. We can also economically cut from one off blanks to the largest production run for immediate or just in time deliveries.

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To find out more about Smiths Metal Centres extensive range of high quality American Aluminium Alloy products, click on one of our products on the side menu of this web page.

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on 0845 527 3331 or click here to contact us.