What is MIG-MAG Welding?
The Difference Between MIG and MAG Welding
The primary difference between MIG (Metal Inert Gas) and MAG (Metal Active Gas) welding lies in the type of gas used. MIG employs an inert gas like argon that does not react with the weld pool, while MAG uses an active gas like CO2, which does react. This can affect the quality of the weld, but CO2 is much cheaper than argon. Often, mixtures of inert and active gases are used to achieve optimal results.
Making a Good MIG-MAG Weld
Various processes are possible within MIG-MAG welding, such as spray arc welding, short arc welding, and pulsed arc welding. The choice depends on the material and thickness being welded. Spray arc welding is suitable for thicker materials due to high voltage and current. For thinner materials, short arc welding or pulsed welding is preferred. Pulsed welding alternates between two current levels, resulting in less heat and fewer weld spatter.
When to Choose MIG/MAG Welding?
MIG/MAG welding is economically appealing due to its speed and efficiency. For aluminum and stainless steel, MIG or a gas mixture is used, while MAG is ideal for steel due to the low cost of CO2. The technique is suitable for a wide range of materials and thicknesses, offering high welding speed and good weld quality. Although post-processing is often needed due to weld spatter, MIG/MAG welding is universally applicable and provides good oxidation protection.
Advantages of MIG/MAG Welding:
- Universally applicable: Suitable for various materials and thicknesses.
- Cost-effective: Especially with the use of CO2 as shielding gas.
- High welding speed: Efficient for large projects.
- Good weld quality: Low risk of contamination with proper settings.
- Good oxidation protection: Thanks to shielding gas.
- Versatile welding positions: Possible in all positions with a torch.
Disadvantages of MIG/MAG Welding:
- Post-processing needed: Due to weld spatter.
- Knowledge required: To ensure good quality.
- Not suitable for outdoors: Sensitive to wind.
- High fume production: Especially at higher currents.
Want to Know More About MIG/MAG Welding?
MIG/MAG welding is versatile and can be done manually or with welding robots. It is used in various industries such as shipbuilding, automotive, and offshore. For more information or specific welding projects, feel free to contact us.