S9074-AR-GIB-010/278
11. ALLIED PROCESSES
11.1 General. This section contains the minimum requirements for welding processes allied to those processes used for welded joints . 11.2 Thermal spraying. Thermal spraying for purposes other than providing corrosion protection by aluminum shall be in accordance with MIL-STD-1687. Thermal spraying for corrosion protection by aluminum shall be in accordance with DOD-STD-2138. 11.3 Thermal Cutting. Thermal cutting may be employed in the preparation of plates, piping, and fabrication subject to the restrictions specified herein. Carbon steels and low alloy steels having a carbon content less than 0.35 percent may be oxyfuel gas cut. Higher alloy steels shall not be oxyfuel gas cut. Wherever practicable. machine thermal cutting shall be used to cut materials greater than 1/2 inch in thickness. After cutting, all scale and slag on the cut surfaces shall be removed by mechanical means prior to further fabrication or use. The discoloration which may remain on the cut surface is not considered to be detrimental oxidation. Themal cut surfaces to be welded shall not contain gouges or other irregularities detrimental to making of sound welds. Preheating, as necessary, shall be done to avoid cracking. 11.3.1 Titanium and titanium alloys. Thermal cut surfaces of S-51. S-52, and S-53 materials shall be conditioned by removing a 1/8-inch minimum of material. beyond the kerf. from the cut surfaces by saw cutting, burring or machining and preparing the weld joint per 7.2.2. The conditioned thermal cut surface shall be inspected visually with 5X magnification prior to wire brushing to ensure absence of cracks and shall be hardness tested per 10.6. 11.4 Resistance welding. Resistance welding shall be perforned with automatically-timed machinery capable of producing welds of acceptable strength, ductility, and corrosion resistance. Qualification of-both prcocedure and equipnent shall be required before any production work is undertaken. The strength, location. and spacing of the welds proposed shall be clearly shown on the drawings submitted for acceptance. Welding shall be in accordance with MIL-W-6858.
11.5 Stud weldinq.
11.5.1 General. Automatic timed arc or percussive (capacitor discharge) welded studs for all permanent applications shall be inspected at the beginning and end of each set-up (diameter change) or shift operation by bending or torque testing five consecutively welded studs. 11.5.1.1 Bend testing. If bend testing is performed. the studs to be tested shall be welded to a piece of material of the same S-group thickness and position as the production application. Bending of production studs is prohibited. Studs shall be bent to an angle of 15 degrees and return using a device similar to that shown on figure 3.
Original 101
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