Compared with traditional methods, ultrasonic welding has many advantages. First, compared to other methods, welding is performed at low temperatures; therefore, manufacturers do not need to spend a lot of fuel or other energy to reach high temperatures, which makes the process cheaper, and it is also faster and safer.

The ultrasonic welding process only takes a fraction of a second to a few seconds. Therefore, it can be completed faster than other methods. In fact, it can bond plastics faster than glue. For example, a transponder chip is installed in a new smart key in a car. The car can only start after sensing the chip. To make a key, put one end of the metal key blank and the chip into the half of the plastic top. Place the other half on top of them and glue to the lower half. This bonding is usually done with glue, which takes some time to cure. Ultrasonic welding can accomplish the same task in less than a second.

Ultrasonic welding does not require flammable fuel and open flames, so it is a safer process compared to other welding methods. Workers must not come into contact with flammable gases or toxic solvents. In electronic products, copper wires are usually connected to electrical contacts on the circuit board through solder. Using ultrasonic welding can accomplish the same task in a short time without exposing workers to the fumes of the negative lead solder. Although exposure to high-frequency sounds may damage the hearing of workers, this potential hazard can be easily reduced by installing an ultrasonic welding machine in a safety box and using ear protection devices.

Finally, ultrasonic welding is as strong and durable as traditional welding of the same material, which is just one of the reasons why this method is used in automobile manufacturing. In order to make cars lighter and more fuel-efficient, automakers are using aluminum as the main body metal. Compared with traditional welding, ultrasonic welding can be used to bond metals in less time and at a lower temperature.