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• providing fluxing elements and deoxidizer
• creating a protective slag coating over the weld as it cools
• establishing arc characteristics
• adding alloying elements.
Covered electrodes serve many purposes in addition to filler metal to the molten pool. These additional functions are provided
mainly by the covering on the electrode.
Electrode Selection
As a general rule, the selection of an electrode is straight forward, in that it is only a matter of selecting an electrode of
similar composition to the parent metal. However, for some metals there is a choice of several electrodes, each of which
has particular properties to suit specific classes of work. It is recommended to consult your welding supplier for the correct
selection of electrode.
Welding Current (Amperage)
Correct current selection for a particular job is an important factor in arc welding. With the current set too low, difficulty is
experienced in striking and maintaining a stable arc. The electrode tends to stick to the work, penetration is poor and beads
with a distinct rounded profile will be deposited. Too high current is accompanied by overheating of the electrode resulting
undercut and burning through of the base metal and producing excessive spatter. Normal current for a particular job may be
considered as the maximum, which can be used without burning through the work, over-heating the electrode or producing
a rough spattered surface. The table shows current ranges generally recommended for a general - purpose type 6013
electrode.
KEEP WORKiNG
KEEP WORKiNG
Keep Working
Average Thickness of
Material
1.0-2.0 mm
2.0-5.0 mm
5.0-8.0 mm
>8.0 mm
Electrodo diameter
2.5 mm
3.2 mm
4.0 mm
5.0 mm
Maximum
Recommended
Electrode Diameter
2.5 mm
3.2 mm
4.0 mm
5.0 mm
Current range
60A - 95A
100A - 130A
130A - 165A
165A - 260A
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