MIL-DTL-13080E
3.4.4 Flaking of covering. Electrode coverings, when tested in accordance with 4.6.7, shall not
flake. Flaking shall be understood to mean a "popping off" or "dropping off" of one or more pieces
of the covering ahead of the welding arc so as to expose at least 50 percent of the circumference of
the core wire. However, such exposure at the arc end at the time of striking the arc shall not be
considered flaking provided that the core wire is not thereby exposed more than 1/8 in. (3.2 mm)
beyond that specified for the arc end in table II.
3.4.5 Fumes. Fumes from the burning coverings of electrodes shall not be injurious to personnel
when adequate ventilation is provided.
3.4.6 Slag removal. Slag deposited by the coverings shall be readily removable from the cooled
weld deposits with the use of hand tools (not air or power operated tools).
3.4.7 Extent of coverings.
3.4.7.1 Arc ends. The arc ends of the electrodes shall be sufficiently bare to permit easy striking
of the arc. The length of the bare portion of the arc end (measured from the end to the point where
the full cross section of the covering is obtained) shall not exceed the limits shown in table II.
Electrodes with chipped coverings near the arc end, which expose the core wire for more than 1/8 in.
(3.2 mm) beyond the specified distance, may be acceptable provided that no chip uncovers more than
50 percent of the circumference of the core.
3.4.7.2 Grip ends. The grip ends shall be bare within the limits shown in table II and on figure 1.
3.4.8 Electrode identification.
3.4.8.1 Labeling. The type designation or classification number shall be stamped or imprinted on
the covering of each electrode on at least two locations. One imprinted type designation shall appear
as closely as practicable to the bare grip end; the location of the second shall be determined by the
manufacturer.
TABLE II. Lengths of bare and tapered portions.
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Grip End
Arc End
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Maximum dis-
Maximum dis-
tance to full
tance to full
Diameter, in. (mm)
Minimum bare
diameter of cov-
diameter of cov-
portion, in. (mm)
ering, in. (mm)
ering, in. (mm)
(A)
(B)
(C)
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1/8, 5/32, 3/16
3/4 (19)
1-1/2 (38)
1/8 (3.2)
(3.2, 4.0, 4.8)
7/32, 1/4, 5/16, 3/8
1 (25.4)
1-3/4 (44)
3/16 (4.8)
(5.6, 6.4, 8.0, 9.5)
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Note: See figure 1 for the significance of (A), (B), and (C).
3.4.8.2 Size and legibility. The imprinted designations shall be composed of block characters of
equal size, the height of which shall be approximately 50 to 100 percent of the overall electrode
diameter (core wire plus covering) but need not exceed a height of 5/32 in. (4 mm). The imprinted
designations shall read from left to right from the grip end as shown on figure 1. The color of the
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