Percussion Welding vs Resistance Welding: Which is Better for Dissimilar Metals? 

Percussion welding uses a low force, high-velocity impact and a rapid discharge of energy to join two similar or dissimilar metals.

Resistance welding, also known as spot welding or resistance spot welding, uses an electrical current to generate heat and fuse two metals.

That answer varies because it hinges on factors such as the type of metals being joined, the size and shape of the parts, and the application requirements.

The percussion welding process is an excellent option for joining similar and dissimilar metals, especially those with significant melting points or thermal conductivity differences, such as steel or copper. This creates a high-quality bond between metals that otherwise would be difficult to join if other welding techniques were used.

Some advantages include the following:

• No filler material is required, creating durable welds
• Minimal heat-affected zone (HAZ)
• Minimal weld distortion and warping
• High bond strength and ductility
• Can join metals of different sizes

However, percussion welding also requires precise alignment and positioning of the parts for high-quality weld joints, which can be challenging for complex geometries. Plus, it only joins small areas of metals at a time. Translation: This probably isn’t your best option for large parts or seam welding. The good news though, is that our Percussion Welder system makes it easy to align and join your materials of the appropriate size and shape.

Resistance welding is a popular technique that joins metals quickly and efficiently – perfect for large-scale production.

Some advantages of the resistance welding process include the following:

• Fast cycle times
• No filler material is required
• Able to join metals of different thicknesses
• Good for automation
• Can use small- and large-scale production

But resistance welding requires a clean surface to ensure a strong weld, and it can create a HAZ that can affect the properties of the metals. Also, it has limitations when joining metals with significant melting points or thermal conductivity differences.

Depending on the application requirements, percussion and resistance welding are both effective for joining materials compatible with their respective abilities. With the right technique, you can create a high-quality, durable bond between dissimilar metals that meets all your project and industry needs.

Contact Percussion Welder today to discuss how our products can benefit your specific microwelding application.