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4145 Aluminum Microwire

Item#: 3L1CXH

4145 Aluminum Microwire

Item#: 3L1CXH

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

4145 aluminum welding wire is a specialized alloy utilized for welding and brazing applications, particularly in the aerospace industry. Its chemical composition is significant due to the inclusion of 5% magnesium, which enhances strength and corrosion resistance, while the addition of silicon helps improve fluidity during the welding process, resulting in smoother, more precise welds.

This alloy's low melting temperature, typically around 565°C (1050°F), makes it well-suited for brazing applications where precise, lower-temperature joining is essential, all while maintaining high strength and corrosion resistance.

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 ER4145
  • AMS 4184
  • ISO 18273, AlSi10Cu4

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

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

$82.00 ($1.64 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.