Characteristics of Aluminum That Affect Weldability

If you have welded aluminum you know that it behaves considerably different than steel.  Other than the strength difference and general appearance, there are four physical characteristics of aluminum that make it weld completely different than steel.  These are: High thermal conductivity High solidification shrinkage High hydrogen solubility Oxide coating When welding aluminum it is […]

7 Ways to Eliminate Porosity in Your Welds

Porosity is a weld discontinuity that is not as detrimental to structural integrity as cracks, undercut, overlap and lack of fusion. However, it is unsightly and when painted it looks absolutely horrible. Because it does not have sharp ends, porosity does not propagate like a crack. The reason why there are limits to the amount […]

Troubleshooting Erratic Wire Feeding

One of the most common troubleshooting calls with the GMAW process has to do with wire feeding problems.  This problem disguises itself in many forms, from arc flaring to lack of penetration.  Sometimes the effects of poor feeding are obvious and easily corrected, other times however it is not easy to spot and fix. If […]