MIL-DTL-13080E
4.6.4.7 Preparation of specimens from joints. Weld test specimens for tension testing shall be
machined in accordance with figure 3. Two transverse tensile specimens shall be tested.
4.6.4.8 Testing of specimens and joints.
4.6.4.8.1 Specimens. Test the specimens to determine tensile strength and elongation.
4.6.4.8.2 Joints. Radiograph the welded test joint after removal of the reinforcement and backing
strip before machining the test specimen from them.
4.6.5 Fillet welds.
4.6.5.1 Welded joint designs. Make fillet weld joints as shown in figures 4A and 4B.
4.6.5.2 Welding procedure. Make one joint each for 1/8 and 5/32 in. (3.2 and 3.97 mm)
electrodes in both vertical and overhead positions. Make one joint each for 1/8, 5/32, 3/16, 7/32,
and 1/4 in. (3.2, 4.0, 4.8, 5.6, and 6.4 mm) electrodes in the horizontal position. The plate material
shall conform to MIL-A-12560 or the equivalent. When performing the vertical welding tests,
deposit the weld by progressing in an upward direction.
4.6.5.3 Specimen examination. Examine the fillet welds for surface holes, surface smoothness,
undercutting, overlapping, excessive convexity, and cracking. Observe the penetration of the weld
to the root of the fillet after breaking specimen 4A as illustrated. Determine the convexity on a
polished and etched section of specimen 4B. Examine both specimens visually for porosity,
cracking, and slag entrapment.
4.6.6 Root pass cracking test.
4.6.6.1 Purpose. To evaluate the susceptibility of weld metal to longitudinal cracking.
4.6.6.2 Welding conditions. The required welding conditions for the root pass cracking test shall
be as stated in table V and as shown on figure 5.
TABLE V. Root pass crack susceptibility requirements.
________________________________________________________________________________________
Length of
Electrode
Arc-
Root bead
Plate tem-
electrode
diameter:
Current,
Voltage
Root gap
thickness
perature:
consumed, min.
°F (°C)
in. (mm)
amp, + 5% (max.)
in. (mm)
in. (mm)
in. (mm) *
_________________________________________________________________________________________
5/32 (4.0)
145
26
3/16 (4.8)
0.160-0.200
60-80
10.5 (267)
(4.6-5.1)
(15.6-26.7)
3/16 (4.8)
185
27
1/4 (6.4)
0.185-0.240
60-80
12.25 (311)
(4.7-6.1)
(15.6-26.7)
1/4 (6.4)
255
28
5/16 (8.0)
0.250-0.330
60-80
14
(356)
(6.4-8.4)
(15.6-26.7)
5/16 (8.0)
315
29
3/8 (9.5)
0.280-0.360
60-80
14 (356)
(7.1-9.15)
(15.6-26.7)
__________________________________________________________________________________________
* Total length of electrode consumed in making a weld.
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