Come unire i metalli senza saldare?

How to Join Metals Without Welding? That is, how can you weld iron, steel, and other metals together without using traditional welding methods? There are many situations where it’s perfectly normal and even advantageous to look for alternatives to welding. Think about the world of DIY, where you may not have access to a welder. Or consider scenarios where there aren’t enough skills to perform a welding job effectively, satisfactorily, or safely. But that’s not all—industrially speaking, it’s often much more convenient to replace welding by finding an efficient method to join metals without melting them together. Welding isn’t always the best or most cost-effective solution, and let’s not forget that welding can produce less-than-ideal aesthetic results. Additionally, welders are often exposed to health risks, from infrared radiation exposure to respiratory damage caused by emissions of carbon monoxide, phosgene, and ammonia. So, there are plenty of good reasons to find the most effective way to join metals without welding. Let’s explore these options!

Alternative to Welding: Brazing

One method for joining metals without welding is brazing. This is a common alternative to welding used widely in industrial settings, with some similarities to welding. It involves heating a filler metal, which melts and flows between two adjacent metal surfaces, binding them together as it cools. Brazing can be done in various ways, such as in a furnace, with a torch, or under vacuum. However, it’s worth noting that brazing costs can sometimes equal or even exceed those of welding, and its mechanical strength is generally lower. Moreover, this technique isn’t ideal for someone who occasionally needs to join metal pieces.

Joining Metals Without Welding: Riveting

Another popular alternative to welding is riveting, especially useful when joining thin sheets or metal parts. Riveting is also accessible for DIY enthusiasts since the tool required—a rivet gun—is simple and relatively inexpensive. The concept is straightforward: the metals to be joined are first drilled, then connected using rivets, which are cylindrical pins that are deformed to “weld” the two pieces together. The downside of riveting lies in its limited shear strength, as it only bonds small areas of the metal sheets. Aesthetic concerns and the need for drilling are also drawbacks to consider.

Securing Metals Without Welding: Lockbolts

The discussion about riveting applies equally well to lockbolts. In fact, you don’t even need a rivet gun here—you just need a drill to make the necessary holes and a wrench to secure the lockbolt itself. The challenge lies in accurately drilling the holes, while the downsides include reduced strength (due to the small bonding area), the need for drilling, and aesthetic issues.

Joining Metals Without Welding: Structural Adhesives and Biadhesives

Finally, there are newer options like structural adhesives and high-performance biadhesives. Although these adhesives for metal bonding have been used for decades, especially in industrial applications, they remain excellent alternatives to welding. Structural adhesives offer greater design flexibility, resulting in a cleaner final product. Importantly, using structural adhesives and biadhesives eliminates the need for drilling, adds no extra weight to the metals, and avoids vibrations, noise, or visual disturbances during application. These adhesives provide high mechanical strength because they bond over a much larger area compared to rivets, spot welds, or bolts. Furthermore, no additional machinery is needed to use tape adhesives or liquid adhesives, and our online store offers solutions tailored to every situation—whether you need small or large formats, tapes or liquids, for different metals and applications.

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