Welding is a tough business requiring equally tough equipment. This is especially true when it comes to high-amperage applications.
Applications exceeding 300 amps generate a large amount of reflective heat from the arc, making it necessary to use front-end consumables—nozzles, contact tips, and gas diffusers—that can withstand the course of welding. Such applications are particularly common in industries such as heavy equipment manufacturing, where the material thicknesses are greater and require the higher amperages to create quality welds. In some automotive applications that employ robotic welding systems, amperages also can be very high.
The right consumables can help in high-amperage applications in a number of ways. They can:
Minimize downtime by preventing premature failures.
Reduce consumables inventory and replacement costs.
Prevent quality issues that require costly rework or result in scrapped parts.
Reduce the risk of damage to the gas metal arc welding (GMAW) gun caused by heat buildup.
The key is to know the factors that negatively affect consumables, ways to extend the life of these components, and what options are available to gain the best results in a given application. Following are some tips to help along the way.