Laser welding vs. MIG welding: When does laser make economic sense?

 

A fabrication shop can be making hundreds of welds per day and still be losing money on rework, grinding, slow cycle times, and labor-intensive production. this is the reason why many manufacturers are reconsidering the traditional welding setup. Laser welding vs. MIG welding is no longer a weld-quality issue. Now it's all about operating cost, production speed, energy consumption and profitability. MIG welding has been widely used in the fabrication industry for years due to its versatility, affordability, and ease of use in various projects. However, those industries that require high-volume production are now moving towards laser systems, as they cut finishing time and increase throughput. So, when does laser welding actually make economic sense compared to MIG welding? It depends on your business's production volume, the material that's being produced, labor costs, and precision requirements.

Understanding the Difference Between Laser and MIG Welding

It is necessary to have an understanding of both processes in actual production situations before comparing the economics of them. MIG welding is a process of joining metals with the help of an electric arc and continuous feeding of the wire electrode. It is popular for its ability to work with thick material, tolerating gaps, and performing well in heavy fabrication.Laser welding is a process that produces narrow and precise welds with low heat input by using a highly focused laser beam. This is the common practice in the industry, which is required to be fast, neat and accurate.

The main differences in operation are:

 

Where MIG Welding Still Makes More Financial Sense

Despite the increasing use of lasers, MIG welding still reigns supreme in many fabricating shops due to the lower entry cost and flexibility. If you have a small shop or business that does custom fabrication work, MIG welding might be a better buy. It is affordable, the operator can be easily trained, and it works well with heavier materials.

MIG welding also performs better when:

• The gap between the joints is uneven.
• Parts are not in line with one another.
• Outdoor or field welding is required
• The quantity of production is small and inconsistent.
• Heavy structure manufacturing is engaged in.

 

Under such circumstances, the return on investment from laser investment may be slow.

When Laser Welding Starts Delivering Better ROI

When manufacturers are interested in the speed of laser welding, its consistency, reduction of operational waste, and the costs of laser welding, they will become more feasible. The major benefit is the productivity. Laser systems can weld very thin materials much quicker than MIG welding can. The faster the weld speed, the better the production output and the fewer labor hours. Laser welding also reduces the amount of post-weld finishing. The weld bead is cleaner and generates less spatter, reducing the time businesses have to spend grinding, polishing, and correcting distortion.

This is very beneficial in the following industries:

• Automotive manufacturing
• Electronics and battery production
• Stainless steel fabrication
• HVAC component manufacturing
• Medical equipment production

 

These industries are those where lower rework and faster cycle times make up for the increased machine expense.

The Real Economic Factors Businesses Should Compare

When deciding between laser welding and MIG welding, many businesses only consider the price of the machine. This will lead to inaccurate calculations of cost. Total production cost over time is a better measure to compare.

Labor Cost

Less manual correction and clean-up needed for laser welding. This helps to decrease manpower dependency, particularly on repetitive production lines. Compared with this, the production of MIG welding generally depends on more grinding work, finishing work and participation of the operator.

Production Speed

Laser systems boost productivity in thin metal production and automation processes. However, MIG welding is typically slower due to the need for further finishing and rework.

Consumables and Energy Usage

MIG welding is more expensive with the higher consumption of filler wire and with the need for more finishing materials. Laser systems typically minimize material waste and use during production.

Rework and Scrap

Laser welding produces more consistent weld quality when part fit-up is controlled properly. On the other hand, MIG welding can produce more spatter and distortion, potentially leading to higher rework requirements in precision applications.

Upfront Investment

MIG welding is still the more economical equipment purchase. Laser systems are more expensive in the upfront cost and require the appropriate safety equipment, which makes them better suited for high-volume manufacturing operations.

Is laser welding replacing MIG welding?

Many manufacturers assume laser technology will completely replace MIG welding. In fact, both approaches are geared for different production objectives. Despite all of these, MIG welding is still vital for structural fabrication, fabrication of thick materials, repairs, and fitup conditions that are inconsistent. Laser welding is optimal for production environments where repeatability, appearance, and production rate are of prime importance. That's why today, many factories are combining both systems with each other rather than choosing one system or the other.

Conclusion

These are not matters of "better or worse" when it comes to the economics of laser welding versus MIG welding. They're about finding the best process for your production, your margin and your growth target.

 

When you have a high-volume shop, clean finishes are important, and you're wasting hours sorting out post-weld rework after every weld, you need to go. However, it needs to be done correctly.

 

Partner with GetStarWeld and discover how advanced MIG welding and laser welding systems can improve productivity, reduce waste, and increase long-term profitability. We collaborate with fabricators to determine just where laser is a cost-effective solution, what size system to procure, and how to bring you to ROI in less time. 

FAQs

Is laser welding stronger than MIG welding?

Laser welding can create a very accurate and strong weld, particularly when working with thin material. While MIG welding is still more suitable for heavy structural welding, MIG welding is the preferred method.

Is laser welding cheaper than MIG welding?

The initial investment is higher for laser welding, but it has the potential to save in labor, clean-up and production costs.

Why is MIG welding still widely used?

MIG welding has the advantage of being inexpensive, versatile and suitable for thick materials, repair projects and projects that do not match up perfectly.