The difference between 6011 and 7018 welding rods primarily lies in their composition, usability, and welding characteristics:
-
6011 Welding Rod:
- Type: Cellulosic electrode.
- Composition: Contains a high amount of cellulose in the flux, which produces a lot of gas during welding.
- Welding Position: Versatile; can be used in all positions (flat, horizontal, vertical, and overhead).
- Arc Characteristics: Produces a fast, forceful arc that can handle dirty or rusted surfaces, making it suitable for outdoor use and less-than-ideal conditions.
- Finish: Leaves a rougher finish and requires more cleanup due to slag.
-
7018 Welding Rod:
- Type: Low-hydrogen electrode.
- Composition: Contains iron powder and a more controlled flux to reduce hydrogen content, which helps prevent weld cracking.
- Welding Position: Best suited for flat and horizontal positions, though it can be used in other positions with proper technique.
- Arc Characteristics: Produces a smooth, stable arc with less spatter and a cleaner finish. It requires a dry storage environment to maintain its low-hydrogen properties.
- Finish: Results in a cleaner, stronger weld with less slag that is easier to clean up.
Summary:
6011 is great for general-purpose welding, especially on dirty surfaces, while 7018 is preferred for structural and critical applications where strength and ductility are essential. The choice between them depends on the specific welding project and conditions.
