Can a MIG Welder Weld Magnetized Metal? A Comprehensive Guide

In the world of welding, magnetized metal can pose a unique challenge, especially when using a MIG (Metal Inert Gas) welder. The magnetic field can interfere with the welding process, causing the welding wire to be pushed away from the weld, resulting in an uneven weld or difficulty in starting the weld. However, with the right techniques and adjustments, a MIG welder can be used to successfully weld magnetized metal.

Understanding the Impact of Magnetic Fields on MIG Welding

Magnetic fields can have a significant impact on the welding process when using a MIG welder. The magnetic field can cause the welding wire to be pushed away from the weld, leading to an unstable arc and an uneven weld. This phenomenon is known as “arc blow” and can be particularly problematic when welding magnetized metal.

The magnetic field can also make it challenging to start the weld, as the welding wire may be pulled away from the desired starting point. This can lead to inconsistent weld quality and increased risk of defects.

Techniques for Welding Magnetized Metal with a MIG Welder

can a mig welder weld magnatized metalImage source: Mig weld example

To overcome the challenges posed by magnetized metal, there are several advanced techniques that can be employed when using a MIG welder:

1. Utilize a Welder with a “Pipe Mode” Setting

Some MIG welders, such as those from Lincoln Electric, have a “pipe mode” setting that is specifically designed to handle magnetized metal. This mode can help compensate for the magnetic field and produce a more stable arc, allowing for a higher-quality weld.

2. Employ a Strong Ground Clamp

Using a strong ground clamp can help reduce the impact of the magnetic field on the welding process. Ensure that the clamp is securely attached to the workpiece and that there is a good electrical connection. This can help mitigate the effects of the magnetic field and improve the stability of the welding arc.

3. Adjust the Welding Parameters

Adjusting the welding parameters, such as voltage and wire feed speed, can help overcome the arc blow caused by the magnetic field. Increasing the voltage or wire feed speed can help the welding wire overcome the magnetic field and maintain a stable arc.

4. Demagnetize the Metal

If possible, demagnetize the metal before welding. This can be done using a slowly decaying AC magnetic field or a DC welder. Demagnetizing the metal can help reduce the magnetic field’s impact on the welding process and produce a more stable arc.

Factors to Consider When Welding Magnetized Metal

When welding magnetized metal with a MIG welder, there are several factors to consider:

  1. Magnetic Field Strength: The strength of the magnetic field can vary, and it’s essential to understand the extent of the magnetization in the workpiece. Stronger magnetic fields will require more advanced techniques to overcome.

  2. Welding Position: The position of the weld can also impact the magnetic field’s influence. Horizontal or overhead welds may be more challenging due to the magnetic field’s orientation.

  3. Welding Consumables: The choice of welding wire and shielding gas can also affect the welding process when dealing with magnetized metal. Experimenting with different consumables may be necessary to achieve the best results.

  4. Welding Technique: The welding technique, such as the travel speed, weave pattern, and torch angle, can also play a role in overcoming the challenges posed by magnetized metal.


Welding magnetized metal with a MIG welder can be a challenging task, but with the right techniques and adjustments, it is possible to achieve high-quality welds. By utilizing a welder with a “pipe mode” setting, employing a strong ground clamp, adjusting the welding parameters, and demagnetizing the metal, welders can overcome the impact of magnetic fields and produce consistent, reliable welds on magnetized workpieces.

Remember, each welding situation is unique, and it may require experimentation and fine-tuning to find the optimal approach for your specific application. By understanding the principles and techniques outlined in this guide, you’ll be well on your way to successfully welding magnetized metal with your MIG welder.


  1. A New Discovery on Welding Magnetized Steel
  2. Can a Large Magnet Screw Up a MIG Weld?
  3. Arc Welding and Magnetized Objects
  4. Welding Magnetized Metal
  5. Demagnetize a Metal with a DC Welder