Welding Cast Iron

Cast iron is not impossible to weld, although many that attempt to do so end up with a cracked weldment. The reason welding cast iron is a big challenge is that it contains up to 4% carbon.  This is an insane amount, considering that any material with a carbon content above 0.30%  is already considered […]

Short-arc vs Globular Transfer in GMAW

What is the difference between globular and short-circuit transfer? Short-circuit is a mode of transfer in GMAW in which metal is transferred from the electrode to the weld pool via a series of electrical short circuits. When the electrode (wire) touches the base material a short occurs and the arc goes out.  At this point […]

Tips for Passing the AWS 3G FCAW Certification

Passing the AWS Structural Welder Qualification Test (vertical up certification on Flux-Cored Arc Welding) can be problematic for some, but insuring the right procedures and techniques  are used should make things a lot easier.  The good thing about this qualification is that if passed it certifies the welder no just in the 3G position, but […]

Effects of Shielding Gases in GMAW

Using the right shielding gas is essential not only to prevent porosity but to get proper penetration, proper mechanical properties, and overall weld quality.  In order to select the right shielding gas you need to consider the following: –          Alloy of filler metal –          Material thickness –          Mode of GMAW (spray, short-arc, etc) –          Welding […]

Benefits of Pulse Welding

We are frequently asked if there are any real benefits of using pulse over CV in the MIG process.  The short answer is “absolutely.” But before we can answer we need to ask: “what is the application?”  To really appreciate the benefits of pulsed GMAW compared to traditional CV (short arc or globular) it is […]

4043 v 5356 Aluminum Filler

Should I use 4043 or 5356 aluminum wire for my application? This is a very commonly asked question.   The application of these two aluminum alloys has such a big overlap that a lot of times it simply comes down to welder preference, cost or availability. When determining which filler alloy to use the most important […]