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A356 (4008) Aluminum Microwire

Item#: 3F4EWH

A356 (4008) Aluminum Microwire

Item#: 3F4EWH

Premium ultra-fine welding wire for all your microscopic applications. Perfect for precision Micro TIG and Laser Welding.

A356 aluminum welding wire, including the aerospace-grade variant known as 4008, is a specialized alloy critical for precision welding applications in the aerospace and automotive industries, particularly in A356.0 and 356.0 aluminum castings. Its carefully balanced chemical composition, featuring silicon, magnesium, and trace elements, provides outstanding weldability and exceptional strength.

This alloy's significance is further enhanced by its heat-treatable properties, allowing for post-weld heat treatment processes to achieve desired material properties, ensuring the structural integrity and safety of critical components in aluminum castings.

50 pieces of MicroWire™ in each tube

  • VCI paper for moisture control
  • Red protective tubing with resealing caps
  • Military Performance Specified foil vacuum package


  • AWS A5.10, Class ERA356.0
  • AWS A5.10, Class ER4010
  • AMS 4181
  • ISO 18273, AlSi7Mg

* Specifications may vary per heat.
Please inquire with your specification before purchasing.

Standard Welding Sizes are also available . Please contact us with your inquiry. 

    $100.50 ($2.01 per piece)

    + Free Shippingwithin the US

    *if you use more than 500 pieces annually, please contact us for OEM pricing



    HQA Wire Products strongly recommends exercising safe welding practices to protect yourself and others. Electric shock can be dangerous and can kill. Fumes and gases can be dangerous to your health. Arc rays can injure eyes and burn skin.

    Safe Welding Practice include but are not limited to:

    • Do not permit electrically live parts or electrodes to contact skin.
    • Do not allow contact with clothing or gloves if they are wet.
    • Insulate yourself from work and ground.
    • Keep fumes and gases from your breathing zone and general area.
    • Keep your head out of fumes.
    • Use enough ventilation for exhaust and arc or both.
    • Wear adequate eye, ear, and bodily protection.
    CA Prop 65

    WARNING: This product can expose you to chemicals including chromium or nickel, which are known to the State of California to cause cancer. For more information go to .

    Please see our Safety Data Sheets regarding safety practices while using this product.