The coatings of these electrodes consist of iron oxides, ferroalloys of manganese and silicon. They guarantee good arc stability which makes them suitable for both alternating current (AC) and direct current (DC). They have a very fluid bath that does not allow vertical welding; furthermore, they do not have a great cleaning power on the base material and this can cause cracks.
They do not withstand high drying temperatures, with the consequent risk of residual moisture and therefore of hydrogen inclusions in the weld