S9074-AQ-GIB-010/248 Rev 1
Requalification of Welding Procedure is Required for the Following Changes Corresponding to Essential Elements Listed to the Left:
The Stud Welding Procedure Qualification Record Shall Include the Following Essential Elements:
e. Gas shield and flow.
A change in shielding as a result of ferrule or flux type.
Any change listed in 4-7.7.
f. Timer range setting.
See 4-7.5.g.
g. Maximum cable length and cable size.
See 4-7.5.j.
h. Amperage range or machine settings.
For drawn arc stud welding, see 4-7.5.h for amperage; for other stud welding, an increase or decrease in amperage.
Change in machine settings other than specifically allowable by this table.
i. Current and polarity.
See 4-7.5.a.
j. Results of bending, flattening, or torque testing, visual examination, and, if required, backside examination.
N/A
k. Lift and plunge settings for drawn arc welding.
See 4-7.4.s.
l. Machine capacitance for capacitor discharge welding. See 4-7.5.i.
m. Charging voltage for capacitor discharge welding.
See 4-7.5.i.
n. Preheat.
See 4-7.8.a.
o. A certification statement in accordance with 4-2.2.
N/A
p. Post weld heat treatment.
See 4-7.8.
q. Material cleaning.
N/A
4-4.4.1 Method of Qualification. Studs, as specified in MIL-S-24149/1 through MIL-S-24149/6 or other approved specification, shall be welded for each material combination and each nominal stud base diameter to be used in production, except as permitted by table 7-3. Qualified base material thickness shall be per table 7-6. Welding in the overhead and horizontal positions shall qualify all positions. Alternatively, each welding position shall be qualified. A minimum of five studs shall be welded in each position and shall be tested as specified in 4-4.4.1.a or 4-4.4.1.b, and 4-4.4.1.d and 4-4.4.1.e below. For stud diameters greater than 3/8 inch, another five studs shall be welded in each position and tested per 4-4.4.1.c below. a. Studs shall be tested by axial tensile loading until failure. The axial tensile load may be applied directly or by torquing, using any convenient means, such as the application of a sleeve over the stud using a washer and a nut with force being applied by a torque wrench. To ensure that the weld is loaded primarily in tension, the threads of the stud should be lubricated with molybdenum disulfide, graphite base, or comparable lubricant. The required axial load or torque shall be not less than the value listed in table 7-16 for the stud material and size tested except that, when failure occurs outside the weld (in the stud or plate), the test shall be considered satisfactory if the axial load or torque was not less than 90 percent of the table value.
4-12
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