weld 1100 - shielded metal arc welding - College of Eastern Utah
weld 1100 - shielded metal arc welding - College of Eastern Utah
weld 1100 - shielded metal arc welding - College of Eastern Utah
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Base Metals and Electrodes<br />
Continued:<br />
Surfacing Electrodes (per AWS A5.13) are commonly used for special<br />
applications such as Corrosion, Wear or Impact resistant deposits.<br />
Special <strong>metal</strong>lurgical or dimensional properties can also be achieved by<br />
strategically selecting your electrode.<br />
Electrode Coverings are “Hygroscopic” --- They will absorb moisture<br />
from the atmosphere. Some electrodes are intended to be “lowhydrogen”<br />
and must be properly packaged and stored to prevent<br />
moisture absorption. As the humidity level and base <strong>metal</strong>/electrode<br />
strength increase, the likelihood <strong>of</strong> hydrogen cracking (due to damp<br />
electrodes) also increase. Low-alloy electrodes ending with 15, 16 or<br />
18 (E7018) are low-hydrogen types. Rod ovens are typically<br />
maintained at 250F.<br />
Most SMAW is performed on <strong>metal</strong> between 1/8” and 1.5” thick. Thicker<br />
materials are more economically <strong>weld</strong>ed with FCAW or SAW
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