MIL-DTL-13080E
4.6.2.4 Method IV (alternate method). At a point near the arc end of the covered length of the
electrode, a portion of the covering material in the form of a band approximately 1/2 inch (12.7 mm)
wide, shall be completely removed to the bare core wire, making sure no metal is removed from the
core wire. Using two V block supports between 1 and 2 inches (25.4 and 50.8 mm) apart and any
measuring instrument (such as a dial indicator gage or optical measuring scope) which rides or
focuses on the bared edge of the core wire, the electrode is rotated 360 degrees (1 turn). The
minimum and maximum measurements shall be recorded. The core wire diameter is measured using
a micrometer. The above procedure shall be repeated at the middle and grip ends of the electrode.
The dimensions obtained shall be used to determine compliance with 3.4.1.
4.6.3 Chemical analysis of deposited weld metal.
4.6.3.1 Preparation of the sample for analysis. Prepare 2-oz (56.7 gram) samples machined from
pads of weld metal measuring 1-1/2 by 1-1/2 by 1/2 in. (38 by 38 by 12.7 mm) minimum height for
deposits from electrodes of 3/16 in. (4.8 mm) or smaller diameter; or measuring 2 by 2 by 1/2 in.
minimum height (50.8 by 50.8 by 12.7 mm minimum height) for deposits from electrodes 7/32 in.
(5.6 mm) or larger diameter. Make the samples from pads of weld metal deposited on steel
conforming to MIL-A-12560, or the equivalent, as approved by the procuring activity. First
machine off the top surface of the pad. Then machine the sample for chemical analysis from the
section immediately below the top surface, in such a manner that no metal will be removed within
1/4 in. (6.4 mm) of the base metal.
4.6.3.2 Preparation of the pad. Deposit each pass so that the width of the pass is 1-1/2 to 2-1/2
times the diameter of the core wire of the electrode being deposited. After depositing each pass,
immerse the pad in cool water for one minute. Deposit the weld metal using as short an arc as
practicable, under the following electrical conditions:
_______________________________________________________________
Electrode size,
Arc voltage,
in. (mm)
Arc amperes 1/
maximum
_______________________________________________________________
1/8 (3.2)
100
25
5/32 (4.0)
130
26
3/16 (4.8
170
27
7/32 (5.6)
200
27
1/4 (6.4
230
28
5/16 (8.0)
300
29
3/8 (9.5)
400
30
_______________________________________________________________
1/ Maximum permissible variation: Plus or minus 10 amperes.
4.6.4 Groove welds.
4.6.4.1 Welded joint designs. Make groove weld test joints in accordance with the designs shown
on figure 3.
4.6.4.2 Groove preparation. Prepare all grooves to the finished dimensions by machining or by
machine gas-cutting, supplemented as necessary by grinding or chipping.
4.6.4.3 Vertical position welds. Make test welds for the vertical welding position by progressing
in an upward direction.
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